Can my imac 27" (2010) support 4GB 1333mhz DDR3 RAM? It currently has 2 2GB 1066mhz DDR3

Here are the RAM specs for your model iMac
Maximum Memory
32 GB (Actual) 16 GB (Apple)
Memory Slots
4 - 204-pin PC3-10600 (1333 MHz) DDR3 SO-DIMM
Purchase reliable Mac RAM from online RAM vendors Crucial memory or OWC (macsales).

Similar Messages

I have an 21.5 Mid 2011 iMac and i want to upgrade my RAM. Currently I have two 2GB and two free slots. Do I have to put in two 2GB in the free slots or can I use two 4GB or 8GB?

I have an 21.5 Mid 2011 iMac and I want to upgrade my RAM. Currently I have two 2GB and two free slots. Do I have to put in two 2GB in the free slots or can I use two 4GB or 8GB?

You can leave the existing RAM in their current slots and add compatible modules in the empty slots. For best performance, add two of teh same size. Our 2010 iMac 21" shipped with 4GB RAM---two 2GB modules in two of the four slots. I added two 2GB modules to the empty slots and now have 8 GB RAM.
Be sure to order RAM from a trusted Mac-savvy RAM vendor. Some vendors thing a Mac is a hamburger. For over a decade I've bought all our Mac RAM (and we have 18 Macs in teh family!) from one vendor:
http://eshop.macsales.com/shop/memory/iMac/2011/DDR3_21.5_27
The link is to the proper RAM for your Mac.
Crucial.com is also a trusted vendor.

Can the imac core duo support dual band wifi?

I have a core duo 2GHz iMac intel. Can the imac core duo support dual band wifi?

Do you mean will your iMac work with a router that supports dual band? If this is correct, the answer is yes. If that isn't what you intended please look at the system specification for your machine. You can find that by clicking Support - Tech Specs

HT2801 Hello ..im currently using iMAC snowleopard 10.6.8 3.06 GHZ INTEL core i3 4GB 1333MHz DDR3......my problem is that my mac accepts cds and dvds...but the icon does not appear in the finder and desktop either.....more over it does not read any cd or

hello im currently using....iMAC snowleopard 10.6.8
3.06 GHz intel i3

i need some help please....my mac acceppts cds and dvds... my drive is located at the right of the screen.....but no icon appears in desktop and finder......also...it does not read....any cd....does not read any dvd either.....it ejects the cds after a while on its own....also it does not burn any cd.....wen i tried....errors with 0x06 ....medium errors,....show up.....also...i tried reinstalling the mac os.....but when i restart the pc...and...keep C key pressed...the cd just gets ejected.....can someone please help me with this problem?????? i contacted APPLE too.. but they said it must be a software problem......also no apple macbookair superdrive does not get connected to the mac either.....PLEASE HELP!!!!

Can the iMac 24 display support 2 inputs i.e. can I conncet my Mini?

My PC is getting old and I'm thinking of switching to an iMac 24". I also have a PowerPC base mini currently shares the display with my Dell using a digital KVM. Is it possible to connect my Mini directly to the iMac 24 and switch the display between the 2 computers?
thanks.

As there is no video input on the iMac, you cannot use the iMac as a display for the mini, but check out the program Steve mentions. I use Microsoft's Remote Desktop to control my PCs from my Mac and CotVNC is supposed to be even better.

Hello There, I have a macbook pro 10.6.8 2GHz intel core i7 4gb 1333MHz DDR3, it is continuously crashing with the following report;

Interval Since Last Panic Report: 38496 sec
Panics Since Last Report:          1
Anonymous UUID:                    FE4BA934-8824-4E34-AEFC-47973A17907E
Wed Oct 30 10:41:08 2013
panic(cpu 6 caller 0xffffff80002251cd): "TLB invalidation IPI timeout: " "CPU(s) failed to respond to interrupts, unresponsive CPU bitmap: 0xc, NMIPI acks: orig: 0x0, now: 0x0"@/SourceCache/xnu/xnu-1504.10.48/osfmk/x86_64/pmap.c:2726
Backtrace (CPU 6), Frame : Return Address
0xffffff805e00b910 : 0xffffff8000204d15
0xffffff805e00ba10 : 0xffffff80002251cd
0xffffff805e00ba80 : 0xffffff8000227e9b
0xffffff805e00bb70 : 0xffffff8000228a24
0xffffff805e00bbc0 : 0xffffff80002184bd
0xffffff805e00bcc0 : 0xffffff80002188ab
0xffffff805e00bcf0 : 0xffffff800021587b
0xffffff805e00bd20 : 0xffffff8000504a42
0xffffff805e00bd40 : 0xffffff8000555709
0xffffff805e00bd90 Machine-check capabilities (cpu 0) 0x0000000000000c09:
family: 6 model: 42 stepping: 7 microcode: 26
Intel(R) Core(TM) i7-2635QM CPU @ 2.00GHz
9 error-reporting banks
threshold-based error status present
extended corrected memory error handling present
Machine-check status 0x0000000000000004:
machine-check in progress
MCA error-reporting registers:
IA32_MC0_STATUS(0x401): 0x0000000000000000 invalid
IA32_MC1_STATUS(0x405): 0x0980000000000000 invalid
IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
IA32_MC3_STATUS(0x40d): 0xbe00000000800400 valid
MCA error code:            0x0400
Model specific error code: 0x0080
Other information:         0x00000000
Threshold-based status:    Undefined
Status bits:
   Processor context corrupt
   ADDR register valid
   MISC register valid
   Error enabled
   Uncorrected error
IA32_MC3_ADDR(0x40e): 0x00003f7f80990317
IA32_MC3_MISC(0x40f): 0x000000000003ffff
IA32_MC4_STATUS(0x411): 0x0000000000000000 invalid
IA32_MC5_STATUS(0x415): 0x0020000000000000 invalid
IA32_MC6_STATUS(0x419): 0x0020000000000000 invalid
IA32_MC7_STATUS(0x41d): 0x0020000000000000 invalid
Package 0 logged:
IA32_MC8_STATUS(0x421): 0x0020000000000000 invalid
Backtrace (CPU 6), Frame : Return Address
0xffffff8058c12eb0 : 0xffffff8000204c3f
0xffffff8058c12fb0 : 0xffffff80002d0238
0xffffff8058c130a0 : 0xffffff80002e48bf
0xffffff805e00b4c0 : 0xffffff80002066f3
0xffffff805e00b5c0 : 0xffffff8000207534
0xffffff805e00b6a0 : 0xffffff800022e717
0xffffff805e00b8c0 : 0xffffff800022ead3
0xffffff805e00b910 : 0xffffff8000204d15
0xffffff805e00ba10 : 0xffffff80002251cd
0xffffff805e00ba80 : 0xffffff8000227e9b
0xffffff805e00bb70 : 0xffffff8000228a24
0xffffff805e00bbc0 : 0xffffff80002184bd
0xffffff805e00bcc0 : 0xffffff80002188ab
0xffffff805e00bcf0 : 0xffffff800021587b
0xffffff805e00bd20 : 0xffffff8000504a42
0xffffff805e00bd40 : 0xffffff8000555709
0xffffff805e00bd90 : 0xffffff80002bf18e
0xffffff805e00bdc0 : 0xffffff8000205536
0xffffff805e00bdf0 : 0xffffff80002029eb
0xffffff805e00be60 : 0xffffff800027413e
0xffffff805e00bed0 : 0xffffff80002c2d6e
0xffffff805e00bfa0 : 0xffffff80002e44f6
BSD process name corresponding to current thread: PPPMonitord
Mac OS version:
10J3210
Kernel version:
Darwin Kernel Version 10.7.1: Mon Jan 31 14:55:53 PST 2011; root:xnu-1504.10.48~4/RELEASE_X86_64
System model name: MacBookPro8,2 (Mac-94245A3940C91C80)
System uptime in nanoseconds: 94058400238
unloaded kexts:
(none)
loaded kexts:
com.apple.filesystems.autofs          2.1.0 - last loaded 52583290782
com.apple.driver.AppleTyMCEDriver          1.0.2d2
com.apple.driver.AGPM          100.12.31
com.apple.driver.AppleHWSensor          1.9.3d0
com.apple.driver.AudioAUUC          1.53
com.apple.driver.AppleUpstreamUserClient          3.5.3
com.apple.driver.AppleMikeyHIDDriver          1.2.0
com.apple.driver.AppleMCCSControl          1.0.17
com.apple.driver.AppleIntelPenrynProfile          17
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AppleMikeyDriver          2.0.2f9
com.apple.kext.ATIFramebuffer          6.3.0
com.apple.driver.AppleIntelHDGraphics          6.3.0
com.apple.driver.AppleIntelNehalemProfile          11
com.apple.driver.AudioIPCDriver          1.1.6
com.apple.driver.AppleHDA          2.0.2f9
com.apple.ATIRadeonX3000          6.3.0
com.apple.driver.SMCMotionSensor          3.0.1d2
com.apple.iokit.AppleBCM5701Ethernet          3.0.2b8
com.apple.driver.AppleIntelMeromProfile          19
com.apple.driver.AppleGraphicsControl          2.10.4
com.apple.driver.AirPort.Brcm4331          429.10.1
com.apple.driver.ACPI_SMC_PlatformPlugin          4.6.0d12
com.apple.driver.AppleLPC          1.5.1
com.apple.driver.AppleBacklight          170.0.43
com.apple.kext.AppleSMCLMU          1.5.2d6
com.apple.driver.AppleIntelSNBGraphicsFB          6.3.0
com.apple.driver.AppleUSBTCButtons          201.2
com.apple.driver.AppleUSBTCKeyEventDriver          201.2
com.apple.driver.AppleUSBTCKeyboard          201.2
com.apple.driver.AppleIRController          303.8
com.apple.iokit.SCSITaskUserClient          2.6.6
com.apple.driver.AppleUSBHub          4.2.0
com.apple.iokit.IOAHCIBlockStorage          1.6.3
com.apple.driver.AppleFWOHCI          4.7.3
com.apple.BootCache          31
com.apple.driver.AppleEFINVRAM          1.4.0
com.apple.driver.AppleSDXC          1.0.2
com.apple.driver.AppleUSBEHCI          4.2.0
com.apple.driver.AppleAHCIPort          2.1.6
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.driver.AppleSmartBatteryManager          160.0.0
com.apple.driver.AppleUSBUHCI          4.2.0
com.apple.driver.AppleACPIButtons          1.3.6
com.apple.driver.AppleRTC          1.3.1
com.apple.driver.AppleHPET          1.5
com.apple.driver.AppleSMBIOS          1.7
com.apple.driver.AppleACPIEC          1.3.6
com.apple.driver.AppleAPIC          1.4
com.apple.driver.AppleIntelCPUPowerManagementClient          142.4.0
com.apple.security.sandbox          1
com.apple.security.quarantine          0
com.apple.nke.applicationfirewall          2.1.11
com.apple.driver.AppleIntelCPUPowerManagement          142.4.0
com.apple.driver.AppleProfileReadCounterAction          17
com.apple.driver.AppleProfileTimestampAction          10
com.apple.driver.AppleProfileThreadInfoAction          14
com.apple.driver.AppleProfileRegisterStateAction          10
com.apple.driver.AppleProfileKEventAction          10
com.apple.driver.AppleProfileCallstackAction          20
com.apple.iokit.KLog          3.9.0
com.apple.iokit.IOSurface          74.2
com.apple.iokit.IOBluetoothSerialManager          2.4.3f1
com.apple.iokit.IOSerialFamily          10.0.3
com.apple.driver.AppleHDAHardwareConfigDriver          2.0.2f9
com.apple.driver.AppleThunderboltDPOutAdapter          1.1.1
com.apple.driver.AppleThunderboltDPInAdapter          1.1.1
com.apple.driver.AppleThunderboltDPAdapterFamily          1.1.1
com.apple.driver.AppleThunderboltPCIDownAdapter          1.0.5
com.apple.driver.DspFuncLib          2.0.2f9
com.apple.iokit.IOAudioFamily          1.8.3fc2
com.apple.kext.OSvKernDSPLib          1.3
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.iokit.IOFireWireIP          2.0.3
com.apple.driver.AppleThunderboltNHI          1.1.9
com.apple.iokit.IOThunderboltFamily          1.2.2
com.apple.iokit.AppleProfileFamily          41
com.apple.driver.AppleHDAController          2.0.2f9
com.apple.iokit.IOHDAFamily          2.0.2f9
com.apple.iokit.IO80211Family          320.1
com.apple.iokit.IONetworkingFamily          1.10
com.apple.driver.IOPlatformPluginFamily          4.6.0d12
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleBacklightExpert          1.0.0
com.apple.iokit.IONDRVSupport          2.2
com.apple.driver.AppleSMC          3.1.0d5
com.apple.kext.ATI6000Controller          6.3.0
com.apple.kext.ATISupport          6.3.0
com.apple.iokit.IOGraphicsFamily          2.2
com.apple.driver.BroadcomUSBBluetoothHCIController          2.4.3f1
com.apple.driver.AppleUSBBluetoothHCIController          2.4.3f1
com.apple.iokit.IOBluetoothFamily          2.4.3f1
com.apple.driver.AppleUSBMultitouch          207.5
com.apple.iokit.IOUSBHIDDriver          4.2.0
com.apple.driver.AppleUSBMergeNub          4.2.0
com.apple.driver.AppleUSBComposite          3.9.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          2.6.6
com.apple.iokit.IOBDStorageFamily          1.6
com.apple.iokit.IODVDStorageFamily          1.6
com.apple.iokit.IOCDStorageFamily          1.6.1
com.apple.driver.XsanFilter          402.1
com.apple.iokit.IOAHCISerialATAPI          1.2.5
com.apple.iokit.IOSCSIArchitectureModelFamily          2.6.6
com.apple.iokit.IOUSBUserClient          4.2.0
com.apple.iokit.IOFireWireFamily          4.2.6
com.apple.iokit.IOAHCIFamily          2.0.5
com.apple.driver.AppleFileSystemDriver          2.0
com.apple.iokit.IOUSBFamily          4.2.0
com.apple.driver.AppleEFIRuntime          1.4.0
com.apple.iokit.IOHIDFamily          1.6.6
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.TMSafetyNet          6
com.apple.kext.AppleMatch          1.0.0d1
com.apple.driver.DiskImages          289
com.apple.iokit.IOStorageFamily          1.6.3
com.apple.driver.AppleACPIPlatform          1.3.6
com.apple.iokit.IOPCIFamily          2.6.1
com.apple.iokit.IOACPIFamily          1.3.0
Panic(CPU 2): Unresponsive processor, TLB state:0
RAX: 0xffffff805f1cb000, RBX: 0xffffff8049e78000, RCX: 0x0000000000000468, RDX: 0x000000002a19f067
RSP: 0xffffff8058b6b178, RBP: 0xffffff8058803ad0, RSI: 0x0000000000000468, RDI: 0xffffff800c7f1000
R8: 0x0000000000100000, R9: 0x0000000000000003, R10: 0x0000000000000000, R11: 0xffffff80004f67da
R12: 0xffffff800c7f1000, R13: 0xffffff808329e000, R14: 0x0000000000000000, R15: 0x0000000000000002
RFL: 0x0000000000000097, RIP: 0xffffff80002e3d70, CS: 0x0000000000000008, SS: 0x0000000000000010
Backtrace (CPU 2), Frame : Return Address
0xffffff8058b68f40 : 0xffffff80002d76d6
0xffffff8058b68f70 : 0xffffff80002d0324
0xffffff8058b68fd0 : 0xffffff80002e40a2
0xffffff8058803ad0 : 0xffffff7f810bf5f8
0xffffff8058803b00 : 0xffffff7f810c928f
0xffffff8058803b20 : 0xffffff7f810be1f6
0xffffff8058803b60 : 0xffffff7f810847cf
0xffffff8058803bb0 : 0xffffff7f8105ef1c
0xffffff8058803be0 : 0xffffff7f80b52167
0xffffff8058803c20 : 0xffffff7f80b521ba
0xffffff8058803c40 : 0xffffff7f80b5a5c5
0xffffff8058803cc0 : 0xffffff7f80b5877e
0xffffff8058803d00 : 0xffffff80005280e7
0xffffff8058803d70 : 0xffffff80005536a7
0xffffff8058803de0 : 0xffffff80002ba734
0xffffff8058803e50 : 0xffffff8000205536
0xffffff8058803e80 : 0xffffff80002029eb
0xffffff8058803ef0 : 0xffffff800027413e
0xffffff8058803f60 : 0xffffff80002c3059
0xffffff8058803fa0 : 0xffffff80002e4854
      Kernel Extensions in backtrace (with dependencies):
         com.apple.ATIRadeonX3000(6.3.0)@0xffffff7f81059000->0xffffff7f812edfff
            dependency: com.apple.iokit.IOPCIFamily(2.6.1)@0xffffff7f80804000
            dependency: com.apple.iokit.IONDRVSupport(2.2)@0xffffff7f80cee000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2)@0xffffff7f80b47000
         com.apple.iokit.IOGraphicsFamily(2.2)@0xffffff7f80b47000->0xffffff7f80b6efff
            dependency: com.apple.iokit.IOPCIFamily(2.6.1)@0xffffff7f80804000
BSD process name corresponding to current thread: WindowServer
Panic(CPU 3): Unresponsive processor, TLB state:0
RAX: 0xffffff800ba89a7c, RBX: 0xffffff800ba89a00, RCX: 0x0000000001000000, RDX: 0x0000000000000000
RSP: 0xffffff8058c6c178, RBP: 0xffffff805e7f3dc0, RSI: 0x000000008000001e, RDI: 0xffffff800ba89a00
R8: 0x0000000000000019, R9: 0x0000000000000000, R10: 0x0000000000001211, R11: 0xffffff80004f4e5e
R12: 0xffffff800b941260, R13: 0xffffff800ba89a00, R14: 0xffffff800bb3d5d0, R15: 0x0000000000000000
RFL: 0x0000000000000086, RIP: 0xffffff80002e3d70, CS: 0x0000000000000008, SS: 0x0000000000000010
Backtrace (CPU 3), Frame : Return Address
0xffffff8058cb4f40 : 0xffffff80002d76d6
0xffffff8058cb4f70 : 0xffffff80002d0324
0xffffff8058cb4fd0 : 0xffffff80002e40a2
0xffffff805e7f3dc0 : 0xffffff800020562a
0xffffff805e7f3df0 : 0xffffff80002029eb
0xffffff805e7f3e60 : 0xffffff800027413e
0xffffff805e7f3ed0 : 0xffffff80002c2d6e
0xffffff805e7f3fa0 : 0xffffff80002e44f6
BSD process name corresponding to current thread: PPPMonitord
Model: MacBookPro8,2, BootROM MBP81.0047.B27, 4 processors, Intel Core i7, 2 GHz, 4 GB, SMC 1.69f4
Graphics: AMD Radeon HD 6490M, AMD Radeon HD 6490M, PCIe, 256 MB
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 384 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 5.100.198.10.1)
Bluetooth: Version 2.4.3f1, 2 service, 12 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST9500325ASG, 465,76 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: FaceTime HD Camera (Built-in), 0x05ac (Apple Inc.), 0x8509, 0xfa200000 / 3
USB Device: Hub, 0x0424 (SMSC), 0x2513, 0xfa100000 / 2
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x0246, 0xfa120000 / 5
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x821a, 0xfa113000 / 8
USB Device: Hub, 0x0424 (SMSC), 0x2513, 0xfd100000 / 2
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0xfd110000 / 3

It looks like a GPU issue. Make an appointment at an Apple store genius bar for a FREE evaluation. Bring a copy of the crash report with you.
Ciao.

HT4255 Can/Should I install 2 x 8GB SDRAM in my iMac Mid-2010?

Can I install 2 x 8GB SDRAM in my iMac Mid-2010? I logged on to Crucial's website and they recommended 2 x 8GB of RAM. But Apple documentation only seems to say that a max of 4 GB SDRAM is supported. I'm currently using 2 x 2GB. My machine is slow (don't think upgrading to Lion helped permformance). Also, I remember years ago (I think) that RAM should be balanced . . . that is, if I currently have 2 x 2GB, I shouldn't add 2 x 4 GB (my machine has 4 slots), but rather have 4 x 2GB total or 2 x 4GB total. Guess my question is whether I'm better off with:
a. 4 x 2GB (i.e., add addition 2 x 2GB)
b. 2 x 4GB (i.e., remove the 2 x 2GB I currently have and replace with 2 x 4GB)
c. 2 x 8GB (i.e., remove the 2 x 2GB I currently have and replace with 2 x 8GB)
I do a lot of HD video editting.
Thanks,
Paul

Hi Paul,
I'm in the same boat. My iMac (mid-2010) 3.2GHz Intel Core i3 is running slow for the last little while. I haven't updated my apps in a while because of it. I want as much RAM as I can have and had previously read about iMac being able to take 32GB. And I've also read that the single channel v flex channel v dual channel is not really going to affect what I use the iMac for. So I'm just checking in to see how your upgrade went.
Currently, I have 2 x 2GB RAM.
Crucial recommend: 2 x 4GB RAM
http://www.crucial.com/store/partspecs.aspx?IMODULE=CT2KIT51264BF1339
Part Number: CT2KIT51264BF1339
Module Size: 8GB Kit (4GBx2)
Package: 204-pin SODIMM
Feature: DDR3 PC3-10600
Specs: DDR3 PC3-10600 • CL=9 • Unbuffered • NON-ECC • DDR3-1333 • 1.35V • 512Meg x 64 •
However, they have a 2 x 8GB RAM, which look to be the same parameters but they don't 'recommend it'.
http://www.crucial.com/store/partspecs.aspx?IMODULE=CT2KIT102464BF1339
Part Number: CT2KIT102464BF1339
Module Size: 16GB kit (8GBx2)
Package: 204-pin SODIMM
Feature: DDR3 PC3-10600
Specs: DDR3 PC3-10600 • CL=9 • Unbuffered • NON-ECC • DDR3-1333 • 1.35V • 1024Meg x 64 •
Can anyone advise on this - love to get the 16GB with my won 4GB to make it 20GB on flex channel.
Thanks
G

IMac mid 2010 21.5' can only run in safe mode

My iMac (mid 2010) cannot reboot recently. It can only be boot in safe mode by pressing 'shift' when turning on. If boot normally, it will stuck on the grey apple logo screen. I tried re-install os, clean os installation, restore os using Time Machine etc, but none of these works.
If I turn off the computer for a whole night, it will then turn on the next morning. But, after a few minutes of watching video in YouTube, the screen gets frozen and I have to restart it manually, then only safe boot can work ... Now, even if I don't touch it for 24 hours, it can't start normally but safe boot.
I run the 'apple hardware test' by pressing D when reboot, the AHT did not detect any hardware problem. But I guess there is hardware problem with the logic board or graphic card.
The operation system is 10.9.4. I restored it to 10.9.2 using Time Machine, but the same symptom.

1. This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve the problem. But with the aid of the test results, the solution may take a few minutes, instead of hours or days.
Don't be put off by the complexity of these instructions. The process is much less complicated than the description. You do harder tasks with the computer all the time.
2. If you don't already have a current backup, back up all data before doing anything else. The backup is necessary on general principle, not because of anything in the test procedure. Backup is always a must, and when you're having any kind of trouble with the computer, you may be at higher than usual risk of losing data, whether you follow these instructions or not.
There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
3. Below are instructions to run a UNIX shell script, a type of program. As I wrote above, it changes nothing. It doesn't send or receive any data on the network. All it does is to generate a human-readable report on the state of the computer. That report goes nowhere unless you choose to share it. If you prefer, you can read it yourself without disclosing the contents to me or anyone else.
You should be wondering whether you can believe me, and whether it's safe to run a program at the behest of a stranger. In general, no, it's not safe and I don't encourage it.
In this case, however, there are a couple of ways for you to decide whether the program is safe without having to trust me. First, you can read it. Unlike an application that you download and click to run, it's transparent, so anyone with the necessary skill can verify what it does.
You may not be able to understand the script yourself. But variations of the script have been posted on this website thousands of times over a period of years. The site is hosted by Apple, which does not allow it to be used to distribute harmful software. Any one of the millions of registered users could have read the script and raised the alarm if it was harmful. Then I would not be here now and you would not be reading this message.
Nevertheless, if you can't satisfy yourself that these instructions are safe, don't follow them. Ask for other options.
4. Here's a summary of what you need to do, if you choose to proceed:
☞ Copy a line of text in this window to the Clipboard.
☞ Paste into the window of another application.
☞ Wait for the test to run. It usually takes a few minutes.
☞ Paste the results, which will have been copied automatically, back into a reply on this page.
The sequence is: copy, paste, wait, paste again. You don't need to copy a second time. Details follow.
5. You may have started the computer in "safe" mode. Preferably, these steps should be taken in “normal” mode, under the conditions in which the problem is reproduced. If the system is now in safe mode and works well enough in normal mode to run the test, restart as usual. If you can only test in safe mode, do that.
6. If you have more than one user, and the one affected by the problem is not an administrator, then please run the test twice: once while logged in as the affected user, and once as an administrator. The results may be different. The user that is created automatically on a new computer when you start it for the first time is an administrator. If you can't log in as an administrator, test as the affected user. Most personal Macs have only one user, and in that case this section doesn’t apply. Don't log in as root.
7. The script is a single long line, all of which must be selected. You can accomplish this easily by triple-clicking anywhere in the line. The whole line will highlight, though you may not see all of it in the browser window, and you can then copy it. If you try to select the line by dragging across the part you can see, you won't get all of it.
Triple-click anywhere in the line of text below on this page to select it:
PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/libexec;clear;cd;p=(Software Hardware Memory Diagnostics Power FireWire Thunderbolt USB Fonts SerialATA 4 1000 25 5120 KiB/s 1024 85 \\b%% 20480 1 MB/s 25000 ports ' com.clark.\* \*dropbox \*GoogleDr\* \*k.AutoCAD\* \*k.Maya\* vidinst\* ' DYLD_INSERT_LIBRARIES\ DYLD_LIBRARY_PATH -86 "` route -n get default|awk '/e:/{print $2}' `" 25 N\\/A down up 102400 25600 recvfrom sendto CFBundleIdentifier 25 25 25 1000 MB com.apple.AirPortBaseStationAgent 464843899 51 5120 files );N5=${#p[@]};p[N5]=` networksetup -listnetworkserviceorder|awk ' NR>1 { sub(/^$[0-9]+$ /,"");n=$0;getline;} $NF=="'${p[26]}')" { sub(/.$/,"",$NF);print n;exit;} ' `;f=('\n%s: %s\n' '\n%s\n\n%s\n' '\nRAM details\n%s\n' %s\ %s '%s\n-\t%s\n' );S0() { echo ' { q=$NF+0;$NF="";u=$(NF-1);$(NF-1)="";gsub(/^ +| +$/,"");if(q>='${p[$1]}') printf("%s (UID %s) is using %s '${p[$2]}'",$0,u,q);} ';};s=(' /^ *$|CSConfigDot/d;s/^ */ /;s/[-0-9A-Fa-f]{22,}/UUID/g;s/(ochat)\.[^.]+(\..+)/\1\2/;/Shared/!s/\/Users\/[^/]+/~/g ' ' s/^ +//;/de: S|[nst]:/p;' ' {sub(/^ +/,"")};/er:/;/y:/&&$2<'${p[10]} ' 1s/://;3,6d;/[my].+:/d;s/^ {4}//;H;${ g;s/\n$//;/s: [^EO]|x([^08]|02[^F]|8[^0])/p;} ' ' 5h;6{ H;g;/P/!p;} ' ' ($1~/^Cy/&&$3>'${p[11]}')||($1~/^Cond/&&$2!~/^N/) ' ' /:$/{ N;/:.+:/d;s/ *://;b0'$'\n'' };/^ *(V.+ [0N]|Man).+ /{ s/ 0x.... //;s/[()]//g;s/(.+: )(.+)/ (\2)/;H;};$b0'$'\n'' d;:0'$'\n'' x;s/\n\n//;/Apple[ ,]|Genesy|Intel|SMSC/d;s/\n.*//;/\)$/p;' ' s/^.*C/C/;H;${ g;/No th|pms/!p;} ' '/= [^GO]/p' '{$1=""};1' ' /Of/!{ s/^.+is |\.//g;p;} ' ' $0&&!/ / { n++;print;} END { if(n<200) print "com.apple.";} ' ' $3~/[0-9]:[0-9]{2}$/ { gsub(/:[0-9:a-f]{14}/,"");} { print|"tail -n'${p[12]}'";} ' ' NR==2&&$4<='${p[13]}' { print $4;} ' ' END { $2/=256;if($2>='${p[15]}') print int($2) } ' ' NR!=13{next};{sub(/[+-]$/,"",$NF)};'"`S0 21 22`" 'NR!=2{next}'"`S0 37 17`" ' NR!=5||$8!~/[RW]/{next};{ $(NF-1)=$1;$NF=int($NF/10000000);for(i=1;i<=3;i++){$i="";$(NF-1-i)="";};};'"`S0 19 20`" 's:^:/:p' '/\.kext\/(Contents\/)?Info\.plist$/p' 's/^.{52}(.+) <.+/\1/p' ' /Launch[AD].+\.plist$/ { n++;print;} END { print "'${p[41]}'";if(n<200) print "/System/";} ' '/\.xpc\/(Contents\/)?Info\.plist$/p' ' NR>1&&!/0x|\.[0-9]+$|com\.apple\.launchctl\.(Aqua|Background|System)$|'${p[41]}'/ { print $3;} ' ' /\.(framew|lproj)|\):/d;/plist:|:.+(Mach|scrip)/s/:[^:]+//p ' '/^root$/p' ' !/\/Contents\/.+\/Contents|Applic|Autom|Frameworks/&&/Lib.+\/Info.plist$/ { n++;print;} END { if(n<1100) print "/System/";} ' '/^\/usr\/lib\/.+dylib$/p' ' /Temp|emac/{next};/(etc|Preferences|Launch[AD].+)\// { sub(".(/private)?","");n++;print;} END { print "'${p[41]}'.plist\t'${p[42]}'";if(n<500) print "Launch";} ' ' /\/(Contents\/.+\/Contents|Frameworks)\/|\.wdgt\/.+\.([bw]|plu)/d;p;' 's/\/(Contents\/)?Info.plist$//;p' ' { gsub("^| |\n","\\|\\|kMDItem'${p[35]}'=");sub("^...."," ") };1 ' p '{print $3"\t"$1}' 's/\'$'\t''.+//p' 's/1/On/p' '/Prox.+: [^0]/p' '$2>'${p[43]}'{$2=$2-1;print}' ' BEGIN { i="'${p[26]}'";M1='${p[16]}';M2='${p[18]}';M3='${p[31]}';M4='${p[32]}';} !/^A/{next};/%/ { getline;if($5<M1) a="user "$2"%, system "$4"%";} /disk0/&&$4>M2 { b=$3" ops/s, "$4" blocks/s";} $2==i { if(c) { d=$3+$4+$5+$6;next;};if($4>M3||$6>M4) c=int($4/1024)" in, "int($6/1024)" out";} END { if(a) print "CPU: "a;if(b) print "I/O: "b;if(c) print "Net: "c" (KiB/s)";if(d) print "Net errors: "d" packets/s";} ' ' /r\[0\] /&&$NF!~/^1(0|72\.(1[6-9]|2[0-9]|3[0-1])|92\.168)\./ { print $NF;exit;} ' ' !/^T/ { printf "(static)";exit;} ' '/apsd|BKAg|OpenD/!s/:.+//p' ' (/k:/&&$3!~/(255\.){3}0/ )||(/v6:/&&$2!~/A/ ) ' ' $1~"lR"&&$2<='${p[25]}';$1~"li"&&$3!~"wpa2";' ' BEGIN { FS=":";p="uniq -c|sed -E '"'s/ +\$[0-9]+\$\$.+\$/\\\2 x\\\1/;s/x1$//'"'";} { n=split($3,a,".");sub(/_2[01].+/,"",$3);print $2" "$3" "a[n]$1|p;b=b$1;} END { close(p);if(b) print("\n\t* Code injection");} ' ' NR!=4{next} {$NF/=10240} '"`S0 27 14`" ' END { if($3~/[0-9]/)print$3;} ' ' BEGIN { L='${p[36]}';} !/^[[:space:]]*(#.*)?$/ { l++;if(l<=L) f=f"\n "$0;} END { F=FILENAME;if(!F) exit;if(!f) f="\n [N/A]";"file -b "F|getline T;if(T!~/^(AS.+ (En.+ )?text$|(Bo|PO).+ sh.+ text ex)/) F=F" ("T")";printf("\nContents of %s\n%s\n",F,f);if(l>L) printf("\n ...and %s more line(s)\n",l-L);} ' ' s/^ ?n...://p;s/^ ?p...:/-'$'\t''/p;' 's/0/Off/p' ' END{print NR} ' ' /id: N|te: Y/{i++} END{print i} ' ' / / { print "'"${p[28]}"'";exit;};1;' '/ en/!s/\.//p' ' NR!=13{next};{sub(/[+-M]$/,"",$NF)};'"`S0 39 40`" ' $10~/\(L/&&$9!~"localhost" { sub(/.+:/,"",$9);print $1": "$9;} ' '/^ +r/s/.+"(.+)".+/\1/p' 's/(.+\.wdgt)\/(Contents\/)?Info\.plist$/\1/p' 's/^.+\/(.+)\.wdgt$/\1/p' ' /l: /{ /DVD/d;s/.+: //;b0'$'\n'' };/s: /{ /V/d;s/^ */- /;H;};$b0'$'\n'' d;:0'$'\n'' x;/APPLE [^:]+$/d;p;' ' /^find: /d;p;' "`S0 44 45`" ' BEGIN{FS="= "} /Path/{print $2} ' );c1=(system_profiler pmset\ -g nvram fdesetup find syslog df vm_stat sar ps sudo\ crontab sudo\ iotop top pkgutil 'PlistBuddy 2>&1 -c "Print' whoami cksum kextstat launchctl sudo\ launchctl crontab 'sudo defaults read' stat lsbom mdfind ' for i in ${p[24]};do ${c1[18]} ${c2[27]} $i;done;' defaults\ read scutil sudo\ dtrace sudo\ profiles sed\ -En awk /S*/*/P*/*/*/C*/*/airport networksetup mdutil sudo\ lsof test osascript\ -e );c2=(com.apple.loginwindow\ LoginHook '" /L*/P*/loginw*' "'tell app \"System Events\" to get properties of login items'|tr \, \\\n" 'L*/Ca*/com.ap*.Saf*/E*/* -d 1 -name In*t -exec '"${c1[14]}"' :CFBundleDisplayName" {} \;|sort|uniq' '~ $TMPDIR.. $ -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 $' '.??* -path .Trash -prune -o -type d -name *.app -print -prune' :${p[35]}\" :Label\" '{/,}L*/{Con,Pref}* -type f ! -size 0 -name *.plist -exec plutil -s {} \;' "-f'%N: %l' Desktop L*/Keyc*" therm sysload boot-args status " -F '\$Time \$Message' -k Sender kernel -k Message Req 'bad |Beac|caug|dead[^bl]|FAIL|fail|GPU |hfs: Ru|inval|jnl:|last value [1-9]|n Cause: -|NVDA$|pagin|proc: t|Roamed|rror|ssert|Thrott|tim(ed? ?|ing )o|WARN' -k Message Rne 'Goog|ksadm|SMC:| VALI|xpma' -o -k Sender fseventsd -k Message Req 'SL' " '-du -n DEV -n EDEV 1 10' 'acrx -o comm,ruid,%cpu' '-t1 10 1' '-f -pfc /var/db/r*/com.apple.*.{BS,Bas,Es,J,OSXU,Rem,up}*.bom' '{/,}L*/Lo*/Diag* -type f -regex .\*[cgh] ! -name *ag \( -exec grep -lq "^Thread c" {} \; -exec printf \* \; -o -true $ -execdir stat -f:%Sc:%N -t%F {} \;|sort -t: -k2 |tail -n'${p[38]} '-L {/{S*/,},}L*/Lau* -type f' '-L /{S*/,}L*/StartupItems -type f -exec file {} +' '-L /S*/L*/{C*/Sec*A,E}* {/,}L*/{A*d,Ca*/*/Ex,Co{mpon,reM},Ex,Inter,iTu*/*P,Keyb,Mail/B,Pr*P,Qu*T,Scripti,Sec,Servi,Spo,Widg}* -path \\*s/Resources -prune -o -type f -name Info.plist' '/usr/lib -type f -name *.dylib' `awk "${s[31]}"<<<${p[23]}` "/e*/{auto,{cron,fs}tab,hosts,{[lp],sy}*.conf,pam.d/*,ssh{,d}_config,*.local} {,/usr/local}/etc/periodic/*/* /L*/P*{,/*}/com.a*.{Bo,sec*.ap}*t /S*/L*/Lau*/*t .launchd.conf" list getenv /Library/Preferences/com.apple.alf\ globalstate --proxy '-n get default' -I --dns -getdnsservers\ "${p[N5]}" -getinfo\ "${p[N5]}" -P -m\ / '' -n1 '-R -l1 -n1 -o prt -stats command,uid,prt' '--regexp --only-files --files com.apple.pkg.*|sort|uniq' -kl -l -s\ / '-R -l1 -n1 -o mem -stats command,uid,mem' '+c0 -i4TCP:0-1023' com.apple.dashboard\ layer-gadgets '-d /L*/Mana*/$USER&&echo On' '-app Safari WebKitDNSPrefetchingEnabled' "+c0 -l|awk '{print(\$1,\$3)}'|sort|uniq -c|sort -n|tail -1|awk '{print(\$2,\$3,\$1)}'" );N1=${#c2[@]};for j in {0..9};do c2[N1+j]=SP${p[j]}DataType;done;N2=${#c2[@]};for j in 0 1;do c2[N2+j]="-n ' syscall::'${p[33+j]}':return { @out[execname,uid]=sum(arg0) } tick-10sec { trunc(@out,1);exit(0);} '";done;l=(Restricted\ files Hidden\ apps 'Elapsed time (s)' POST Battery Safari\ extensions Bad\ plists 'High file counts' User Heat System\ load boot\ args FileVault Diagnostic\ reports Log 'Free space (MiB)' 'Swap (MiB)' Activity 'CPU per process' Login\ hook 'I/O per process' Mach\ ports kexts Daemons Agents launchd Startup\ items Admin\ access Root\ access Bundles dylibs Apps Font\ issues Inserted\ dylibs Firewall Proxies DNS TCP/IP Wi-Fi Profiles Root\ crontab User\ crontab 'Global login items' 'User login items' Spotlight Memory Listeners Widgets Parental\ Controls Prefetching SATA Descriptors );N3=${#l[@]};for i in 0 1 2;do l[N3+i]=${p[5+i]};done;N4=${#l[@]};for j in 0 1;do l[N4+j]="Current ${p[29+j]}stream data";done;A0() { id -G|grep -qw 80;v[1]=$?;((v[1]==0))&&sudo true;v[2]=$?;v[3]=`date +%s`;clear >&-;date '+Start time: %T %D%n';};for i in 0 1;do eval ' A'$((1+i))'() { v=` eval "${c1[$1]} ${c2[$2]}"|'${c1[30+i]}' "${s[$3]}" `;[[ "$v" ]];};A'$((3+i))'() { v=` while read i;do [[ "$i" ]]&&eval "${c1[$1]} ${c2[$2]}" \"$i\"|'${c1[30+i]}' "${s[$3]}";done<<<"${v[$4]}" `;[[ "$v" ]];};A'$((5+i))'() { v=` while read i;do '${c1[30+i]}' "${s[$1]}" "$i";done<<<"${v[$2]}" `;[[ "$v" ]];};';done;A7(){ v=$((`date +%s`-v[3]));};B2(){ v[$1]="$v";};for i in 0 1;do eval ' B'$i'() { v=;((v['$((i+1))']==0))||{ v=No;false;};};B'$((3+i))'() { v[$2]=`'${c1[30+i]}' "${s[$3]}"<<<"${v[$1]}"`;} ';done;B5(){ v[$1]="${v[$1]}"$'\n'"${v[$2]}";};B6() { v=` paste -d: <(printf "${v[$1]}") <(printf "${v[$2]}")|awk -F: ' {printf("'"${f[$3]}"'",$1,$2)} ' `;};B7(){ v=`grep -Fv "${v[$1]}"<<<"$v"`;};C0(){ [[ "$v" ]]&&echo "$v";};C1() { [[ "$v" ]]&&printf "${f[$1]}" "${l[$2]}" "$v";};C2() { v=`echo $v`;[[ "$v" != 0 ]]&&C1 0 $1;};C3() { v=`sed -E "$s"<<<"$v"`&&C1 1 $1;};for i in 1 2;do for j in 0 2 3;do eval D$i$j'(){ A'$i' $1 $2 $3; C'$j' $4;};';done;done;{ A0;D20 0 $((N1+1)) 2;D10 0 $N1 1;B0;C2 27;B0&&! B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D23 0 $((N1+4)) 5 4;D13 0 $((N1+9)) 59 50;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 1 10 7 9;D13 1 11 8 10;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D23 5 14 12 14;D22 6 36 13 15;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D22 35 49 61 51;D22 11 17 17 20;for i in 0 1;do D22 28 $((N2+i)) 45 $((N4+i));done;};D22 12 44 54 45;D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A2 19 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;A2 4 20 21;B7 6;B2 9;A4 14 7 52 9;B2 10;B6 9 10 4;C3 25;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 4 22 29;B7 12;B2 14;A4 14 6 52 14;B2 15;B6 14 15 4;B3 0 0 30;C3 29;A1 4 23 27;B7 13;C3 30;D13 24 24 32 31;D13 25 37 32 33;A2 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D13 21 0 32 19;D13 10 42 32 40;D22 29 35 46 39;};D23 14 1 62 42;D12 34 43 53 44;D22 0 $((N1+8)) 51 32;D13 4 8 41 6;D12 26 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 33 34 42 37;B1&&D23 35 45 55 46;D23 32 31 43 38;D12 36 47 32 48;D13 20 42 32 41;D13 37 2 48 43;D13 4 5 32 1;D13 4 3 60 5;D12 26 48 49 49;B3 4 22 57;A1 26 46 56;B7 22;B3 0 0 58;C3 47;D22 4 4 50 0;D23 22 9 37 7;A7;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
8. Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Click anywhere in the Terminal window and paste by pressing command-V. The text you pasted should vanish immediately. If it doesn't, press the return key.
9. If you see an error message in the Terminal window such as "Syntax error" or "Event not found," enter
exec bash
and press return. Then paste the script again.
10. If you're logged in as an administrator, you'll be prompted for your login password. Nothing will be displayed when you type it. You will not see the usual dots in place of typed characters. Make sure caps lock is off. Type carefully and then press return. You may get a one-time warning to be careful. If you make three failed attempts to enter the password, the test will run anyway, but it will produce less information. In most cases, the difference is not important. If you don't know the password, or if you prefer not to enter it, press the key combination control-C or just press return three times at the password prompt. Again, the script will still run.
If you're not logged in as an administrator, you won't be prompted for a password. The test will still run. It just won't do anything that requires administrator privileges.
11. The test may take a few minutes to run, depending on how many files you have and the speed of the computer. A computer that's abnormally slow may take longer to run the test. While it's running, there will be nothing in the Terminal window and no indication of progress. Wait for the line
[Process completed]
to appear. If you don't see it within half an hour or so, the test probably won't complete in a reasonable time. In that case, close the Terminal window and report what happened. No harm will be done.
12. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
At the top of the results, there will be a line that begins with the words "Start time." If you don't see that, but instead see a mass of gibberish, you didn't wait for the "Process completed" message to appear in the Terminal window. Please wait for it and try again.
If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
13. When you post the results, you might see an error message on the web page: "You have included content in your post that is not permitted," or "You are not authorized to post." That's a bug in the forum software. Please post the test results on Pastebin, then post a link here to the page you created.
14. This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

Does iMac 2009 A1224 support DDR3 1333MHz Ram or not?

Hi, I got lucky and came across a free set of 4GB 2Rx8 PC3-10600S-09-11-F3 Ram. My question is, if an iMac model A1224 supports 1333MHz or not?
Any help greatly appreciated
Cheers

It supports:
Maximum Memory
8.0 GB
Memory Slots
2 - 204-pin PC3-8500 (1066 MHz) DDR3 SO-DIMM
You cannot use 1333 MHz memory in that iMac.

HT1338 i have tried to update the iPhoto in an iMac from 2010 which i have updated from Snow Leopard to to Mountain Lion but its impossible.What can i do?

i have tried to update the iPhoto in an iMac from 2010 ( in which i have updated the OS from SnowLeopard to Mountain Lion 10.8.3) but it doesnt work,why? Is my iPhoto too old to update do i have to buy and install a new version of i Photo ?

You may need to buy the newest version from the App Store. If you cannot update via the App Store then you are using the version from a DVD. Updates for that can be downloaded from support.apple.com/downloads/.

I have an iMac (Mid 2010) and am running 0sx 10.8.5 and the WiFi always loses connection during sleep mode. I have seen numerous different solutions none of which seem to work. Can anyone help?

I have an iMac (Mid 2010) and am running 0sx 10.8.5 and the WiFi always loses connection during sleep mode. I have seen numerous different solutions none of which seem to work. Can anyone help?

Test after taking each of the following steps that you haven't already tried. Back up all data before making any changes.
1. Make sure the network is on the preferred list by following these instructions. It's important to read the article carefully, as it's the starting point for any further efforts to solve the problem. If you skip any of the steps, the problem may not be solved. Make sure the box marked
          Remember networks this computer has joined
is checked.
2. Follow the instructions in this support article under the heading
          Symptom: After restarting or waking from sleep, my computer might not connect to the Internet
3. Reset the PRAM.
4. Make a note of all your settings for Wi-Fi in the Network preference pane, then delete the connection from the connection list and recreate it with the same settings. You do this by clicking the plus-sign icon below the connection list, and selecting Wi-Fi as the interface in the sheet that opens. Select Join other network from the Network Name menu, then select your network. Enter the password when prompted and save it in the keychain.
5. From the Location menu at the top of the Network preference pane, select Edit Locations. A sheet will drop down. Click the plus-sign button to create a new location. Give it any name you want. In the new location, set up the Wi-Fi service with the same settings you used before. Click Apply and test.
6. Launch the Keychain Access application. Search for and delete all AirPort network password items that refer to the network. Make a note of the password first.
7. Repair permissions on the startup volume.
8. Turn off Bluetooth and test.
9. Reset the System Management Controller.
10. This step shouldn't be necessary, but has been advised by Apple Support in some cases, apparently as a workaround for a bug. Open the Energy Saver pane in System Preferences. If applicable, click the padlock icon in the lower left corner to unlock the settings. Enter your administrator login password when prompted.
Select the Power Adapter tab and uncheck the boxes marked
          Wake for Wi-Fi network access
and
          Enable Power Nap...
if present. Then, if the computer is a MacBook, select the Battery tab and uncheck
          Enable Power Nap...
11. Reinstall OS X.

Imac 21inch 2010 on boot vertical green lines then white screen ,will not load can anyone help please

imac 21inch 2010 on boot vertical green lines then white screen ,will not load can anyone help please

Howdy carliosa,
If your iMac is not starting up normally you may need to do some checking to make sure things are working correctly. I would suggest starting with the steps in this article -
Resolve startup issues and perform disk maintenance with Disk Utility and fsck - Apple Support
Thanks for using Apple Support Communities.
Best,
Brett L

HT204053 can a imac support mutilple iclouds i.e. can ecah family member have ther own cloud

Can an IMAC support multiple iclouds, i.e. can each family member have their own cloud

You can do this, but each family member will need a separate email address in order to set up an iCloud account; and each will need their own user account on the Mac in order to keep the iCloud accounts separate.

I have an iMac mid 2010. After Disk utilities said the drive was corrupt, I ran the hardware test (extended) 3 times. No problems. I than ran Disk utility again and got 2 messages in red-keys out of order, and --Volume corrupt, can't be repaired. I tried

I have an iMac mid 2010. After Disk utilities said the drive was corrupt, I ran the hardware test (extended) 3 times. No problems. I than ran Disk utility again and got 2 messages in red…keys out of order, and ……Volume corrupt, can't be repaired.
I tried to do a system install, but message said…disk can't be changed. Will a complete erase and install fix this ?
Everything is backed-up.

There's hardware and software.
Your drive could physically be in good condition but something has caused the file structure to be messed up (it just happens sometimes). The directory that keep track of files is corrupt. Disk Utility can help determine if that is the issue. In some cases it can repair the problem but it cannot do it to a drive that is being used to boot the system while you are doing that. You have to boot from another drive. Some things DU cannot repair and you need to try a stronger utility such as Diskwarrior.
A failing hard drive (one with mechanical issues) can be a cause of file structure issues but this is by no means always the case. Apart from looking at the SMART diagnosis feature of Disk Utility (and smart isn't totally reliable) there often isn't a way to tell if a drive is failing until it suddenly happens, which is why you need to maintain backups.
In your situation it does sound serious and not just minor directory corruption. You can try erasing (formatting) the drive, You may need to do this if it is really corrupt, in which case there could be underlying physical issues. I use old technology but if you have the patience you can try erasing the drive with the security option of writing zeros once (don't do more unless you are going on a 3 week vacation). This makes the drive not simply assume everything is okay by forcing it try every part of the drive by writing data. If something is gong wrong you may find it marks a lot of bad sectors, or flat out refuses to format. Then you know you need a new drive.

Can i use my 2010 20" imac as an external monitor for my Power mac

can i use my 2010 20" imac as an external monitor for my Power mac? Sounded like a 'no' a couple years back, but not sure if there are any new adapters out there.

https://discussions.apple.com/thread/4082303?start=0&tstart=0

Can my imac 27" (2010) support 4GB 1333mhz DDR3 RAM? It currently has 2 2GB 1066mhz DDR3

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