Wifi chip defective since updates please help someone

Why is there so many wifi chip defects with the updates.

Try the suggestions here to see if they resolve your problem:
http://support.apple.com/kb/ts1559
If these don't work you may have a hardware problem. Visit an Apple store for an evaluation or contact Apple Support.

Similar Messages

Nothing will load or install correctly since update please help.

Okay here is my problem I am having. Ever since windows 8.1 updated about a week ago, I cannot for the life of me get anything to install. Steam client will not install, Sims 3 will not install. I thought it was a virus or malware, but I have norton
and it keeps telling me no. I don't know what to from here please help if you can or direct me to some possible solutions to my problem.
Thanks in advanced!!

Hi
If you turn off UAC and then reboot. try install the applications again.
or you can right click the setup and "RunAs Administrator"
Lastly, are you an admin on the machine?
Hope this helps. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

IPad 2 cannot connect to Wifi before and after updating PLEASE HELP

i have been using iOS 5.1.1 till today.. the connection to wifi stopped working.. it slowly faded away and today i woke up and could not connect to My wifi at all, i have decided to update my iPad to iOS 7.0.4 but the problem is there
what should i doo ??

It could be a problem with your WiFi router or your iPad.
If you are having WiFi problems it is necessary to isolate whether the problem is with your network or your iPad. Note: Do NOT consider your network to be blameless if some other devices can connect to it.
First, test your iPad on some other WiFi networks: a friends, Starbucks, Barnes & Noble, etc.
If it works well there then the problem is probably with your network. Try restarting your WiFi router by removing power for 30 seconds. If that does not help check for a firmware update for your router. If none exists which corrects the problem consider replacing the router.
If your iPad does not function well on other networks it possibly has a hardware problem. You could try Settings > General > Reset > Reset Network Settings to see if that corrects the problem. If not, contact Apple Support or visit an Apple store for evaluation. They can provide a replacement if your iPad is bad.
If you need more help please give the make, model, and version of your WiFi router and how you have it configured.
See also here: http://www.apple.com/support/ipad/wifi/

My App Store won't allow me to download any apps. It says such and such app is unable to download try again later every time. I have enough storage all my devices are up to date on all updates please help

My App Store won't allow me to download any apps. It says such and such app is unable to download try again later every time. I have enough storage all my devices are up to date on all updates please help

I am a librarian at a 1:1 iPad school and we are having this problem with all ~3000 student iPads as well at ~300 teacher iPads. This is extremely frustrating. I have tried suggested fixes found on other discussion boards but none have worked.

TS1814 I have windows vista and this did not work for my ipod it still will not update PLEASE HELP!

I have windows vista and this did not work for my ipod it still will not update PLEASE HELP!
iTunes for Windows: iTunes cannot contact the iPhone, iPad, or iPod software update server

Try this:
Close your iTunes,
Go to command Prompt -
(Win 7/Vista) - START/ALL PROGRAMS/ACCESSORIES, right mouse click "Command Prompt", choose "Run as Administrator".
(Win XP SP2 n above) - START/ALL PROGRAMS/ACCESSORIES/Command Prompt
In the "Command Prompt" screen, type in
netsh winsock reset
Hit "ENTER" key
Restart your computer.
If you do get a prompt after restart windows to remap LSP, just click NO.
Now launch your iTunes and see if it is working now.
If you are still having these type of problems after trying the winsock reset, refer to this article to identify which software in your system is inserting LSP:
iTunes 10.5 for Windows: May see performance issues and blank iTunes Store
http://support.apple.com/kb/TS4123?viewlocale=en_US

Using Firefox, I am unable to do my microsoft windows updates, please help!

I just downloaded Firefox, and I am unable to do my Microsoft updates, please help!
== This happened ==
Every time Firefox opened
== I downloaded Firefox today

Use IE for Microsoft updates. MS updates use AciveX, which Firefox doesn't support.

Using iweb 11 I can no longer publish site updates, please help.

I am using iweb 11 and Lion and I can no longer publish site updates, please help.

What a brilliant solution, Roddy. Never would have thought of that.

My iPhone 4S is not preforming any network related operations after 5.0.1 update - please help!

My iPhone 4S is not preforming any network related (Calls, Messages) operations after 5.0.1 update - please help!

5.0.2 has not been released, thus you can not upgrade.
Stedman

Hi there.candy crush not loading on my mac.been playing with it via facebook.flash player is updated.please help thank you

hi there.candy crush not loading on my mac.been playing with it via facebook.flash player is updated.please help thank you

Have you tried uninstalling . rebooting the computer and then reinstalling?

Bluetooth and JBL Flip not pairing since IOS 8.1 update-Please Help

After last IOS update (8.1) for iPhone 5 my JBL flip suddenly stopped pairing with the Bluetooth in my phone. I tried the forget this device to reinstall connection which usually works, but this did not work and I have attempted several times over the past week to no avail. It recognizes device but then will not pair with it, then it disappears from the Bluetooth device menu on my phone. Anyone know of a patch of fix? JBL tech's report it's an APPLE issue. All I know is I'm going nuts not having any music in my office. PLEASE HELP.

For others who have this same problem, before using deggie's solution, which is more drastic since it will force you to lose all pairings and wi-fi passwords, first try this: On the iPhone go to Settings>Bluetooth, then forget your JBL pairing. Then with the JBL Flip, turn it on by hitting the power button once, then put it into pairing mode by holding the power button down until it flashes red and blue alternately. You should see the pairing established on you iPhone. If the iPhone asks for a pairing code (it may not), it is 0000.

No 3g since iO7 update - please help!

I had some minor issues since i updated iOS7. Rebooted today and since have no mobile data. Clearly switched on but no 3g/E or anything in top bar and when i try to use apps that require 3g phone promts me to switch it on. I have turned off and on again. I have reset network settings. I updated to iOS 7.0
Please help! I need email and calendar updates for work. Thank you in advance for your advice!!

Well, the outage is still ongoing and has now hit the papers, so don't believe everthing that O2 is saying
http://www.telegraph.co.uk/technology/news/10354066/O2-customers-suffer-wide-sca le-network-outage.html

Whenever I try to open my Wifi Connection at home, it doesn't work! It just stays on 3G, and I want to update my phone, but In order for me to do this, I have to connect through WiFi to ignore additional charges, please help!

Hey! So basically, I've been using my Wifi connection (from home) lately, I had no troubles what-so-ever. I turned on my 3G network this morning, and again, everything's going perfectly fine with my connection. I came home around half 4 from school and decided to turn on my Wifi connection at home, what I've realised is that whenever I try turning on my Wifi network, the little sign that's usually at the top doesn't appear anymore. I tried resetting the network settings and closing and opening my phone, but.. This didn't really make any difference. I'm really worried and I don't know what to do! I have tried reconnecting to my Wifi but nothing happened, my Bluetooth's never really turned on. Please help!!

I'm not sure if I'm understanding but if I am then I'm not sure why you are turning your Wi-Fi off and on. It should automatically connect and use your Wi-Fi when it is available and use your cellular data connection when Wi-Fi is not available. I haven't turned either off ever. However, more to the point of your current problem, the following has some troubleshooting steps that may help: http://support.apple.com/kb/TS1398

Connectivity issues after 8.1.1 update please help! :(

Hi all. Here's the situation.
I got my Iphone 6 on release day.
Not had one single problem with it.
On Monday however I do a general software update to IOS 8.1.1
Now ever since then I cannot keep a steady connection to both WIFI AND my roaming internet.
BOTH show as connected however load EXTREMELY slowly or not at all. No matter where I am.
I have done a soft reset.
Switching on and off.
And resetting Network Settings.
Done all these 3 or 4 times and they are not helping.
It is too coincidental to not be because of the software update.
Can someone please help me?

Still no help for you? I updated my iPhone 6 to 8.1.1 this past weekend and now have huge connectivity issues too. My home WiFi signal is 5 bars but runs very slow for example Facebook, the phone cannot update messages or photos. Try to connect for online banking, forget it. I have turned off WIFI and try using my Verizon signal which is 3 out if 5 bars, same problem. Don't understand why Apple cannot fix this apparent bug. Will call Apple Care in a few minutes and let you know what they say.

IMAC suddenly stops working Mouse,keyboard, wifi all stops responding. PLEASE HELP

iMAC suddenly stops working,display is on but key board and mouse does not respond.I changed keyboard with usb also but still same.even wifi stops working also.PLEASE HELP before there was some kernel panic errors , i updated every thing, installed an original osx mountain Lion. taken to Apple service center. They found nothing wrong with hard ware. But i am having still the same problems. It just stops responding to keyboard, mouse even wifi goes off some time. I thought it may be keyboard mouse problem so i changed them to normal usb keyboard and mouse but still the same. PLEASE PLEAE HELP. -------- LAST ERROR REPORT IS BELOW Interval Since Last Panic Report: 687085 sec Panics Since Last Report: 2 Anonymous UUID: 48C67BCC-4ADB-0131-8FCC-DBD9C01FBB0C Fri Jul 19 17:23:01 2013 panic(cpu 0 caller 0xffffff80096b8655): Kernel trap at 0xffffff7f8a53f351, type 14=page fault, registers: CR0: 0x000000008001003b, CR2: 0x0000000000000060, CR3: 0x000000000bf36000, CR4: 0x0000000000000660 RAX: 0x0000000000000000, RBX: 0x0000000000000000, RCX: 0x0000000000000018, RDX: 0x0000000000000004 RSP: 0xffffff8089c4ba60, RBP: 0xffffff8089c4ba80, RSI: 0x0000000000000060, RDI: 0x00000000ffffff8f R8: 0x00000000000000ff, R9: 0x0000000000000019, R10: 0xffffff8074831004, R11: 0x0000000000000008 R12: 0x0000000000000000, R13: 0xffffff807482e0ec, R14: 0x00000000ffffffff, R15: 0x0000000000000000 RFL: 0x0000000000010297, RIP: 0xffffff7f8a53f351, CS: 0x0000000000000008, SS: 0x0000000000000010 Fault CR2: 0x0000000000000060, Error code: 0x0000000000000000, Fault CPU: 0x0 Backtrace (CPU 0), Frame : Return Address 0xffffff8089c4b700 : 0xffffff800961d626 0xffffff8089c4b770 : 0xffffff80096b8655 0xffffff8089c4b940 : 0xffffff80096ce17d 0xffffff8089c4b960 : 0xffffff7f8a53f351 0xffffff8089c4ba80 : 0xffffff7f8a525ff5 0xffffff8089c4bac0 : 0xffffff7f8a53a352 0xffffff8089c4bb50 : 0xffffff7f8a50da56 0xffffff8089c4bbb0 : 0xffffff7f8a4e5c36 0xffffff8089c4bbf0 : 0xffffff7f8a4e71b4 0xffffff8089c4bc20 : 0xffffff7f8a547d3c 0xffffff8089c4bc50 : 0xffffff7f8a4fad5b 0xffffff8089c4be00 : 0xffffff7f8a4f8a9e 0xffffff8089c4be40 : 0xffffff7f8a4fee0e 0xffffff8089c4be80 : 0xffffff7f8a5454df 0xffffff8089c4beb0 : 0xffffff7f8a58c82e 0xffffff8089c4bf00 : 0xffffff8009a4b1ab 0xffffff8089c4bf60 : 0xffffff800963e25e 0xffffff8089c4bfb0 : 0xffffff80096b3137 Kernel Extensions in backtrace: com.apple.driver.AirPort.Atheros40(600.72.2)[EBF8D6E8-59C6-3C1C-9549-32DDA193B1 D2]@0xffffff7f8a4ad000->0xffffff7f8a5f5fff dependency: com.apple.iokit.IOPCIFamily(2.7.3)[1D668879-BEF8-3C58-ABFE-FAC6B3E9A292]@0xffff ff7f89c83000 dependency: com.apple.iokit.IO80211Family(530.4)[E86BEE31-8EE0-34BE-A53F-2571D85CC628]@0xff ffff7f8a43e000 dependency: com.apple.iokit.IONetworkingFamily(3.0)[F02560D1-ADE6-3AD9-8D05-43CB2B7C8B87]@0 xffffff7f89ddc000 BSD process name corresponding to current thread: kernel_task Mac OS version: 12E55 Kernel version: Darwin Kernel Version 12.4.0: Wed May 1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64 Kernel UUID: 896CB1E3-AB79-3DF1-B595-549DFFDF3D36 Kernel slide: 0x0000000009400000 Kernel text base: 0xffffff8009600000 System model name: iMac10,1 (Mac-F2268DC8) System uptime in nanoseconds: 397672779228 last loaded kext at 256566570174: com.apple.filesystems.msdosfs 1.8.1 (addr 0xffffff7f8b624000, size 65536) last unloaded kext at 363393284081: com.apple.filesystems.msdosfs 1.8.1 (addr 0xffffff7f8b624000, size 57344) loaded kexts: com.apple.filesystems.smbfs 1.8.4 com.apple.driver.AudioAUUC 1.60 com.apple.driver.AppleHDA 2.3.7fc4 com.apple.driver.AppleMikeyHIDDriver 122 com.apple.driver.AGPM 100.12.87 com.apple.driver.AppleHWSensor 1.9.5d0 com.apple.driver.AppleUpstreamUserClient 3.5.10 com.apple.kext.AMDFramebuffer 8.1.2 com.apple.driver.AppleMikeyDriver 2.3.7fc4 com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0 com.apple.driver.AppleLPC 1.6.0 com.apple.driver.AppleBacklight 170.2.5 com.apple.driver.AppleMCCSControl 1.1.11 com.apple.ATIRadeonX2000 8.1.2 com.apple.iokit.IOUserEthernet 1.0.0d1 com.apple.iokit.IOBluetoothSerialManager 4.1.4f2 com.apple.Dont_Steal_Mac_OS_X 7.0.0 com.apple.driver.ApplePolicyControl 3.4.5 com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport 4.1.4f2 com.apple.filesystems.autofs 3.0 com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1 com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1 com.apple.BootCache 34 com.apple.driver.AppleIRController 320.15 com.apple.iokit.SCSITaskUserClient 3.5.5 com.apple.driver.AppleUSBCardReader 3.1.7 com.apple.driver.XsanFilter 404 com.apple.iokit.IOAHCIBlockStorage 2.3.1 com.apple.driver.AppleUSBHub 5.5.5 com.apple.driver.AppleFWOHCI 4.9.6 com.apple.driver.AirPort.Atheros40 600.72.2 com.apple.driver.AppleRTC 1.5 com.apple.driver.AppleAHCIPort 2.5.2 com.apple.nvenet 2.0.19 com.apple.driver.AppleUSBEHCI 5.5.0 com.apple.driver.AppleUSBOHCI 5.2.5 com.apple.driver.AppleEFINVRAM 1.7 com.apple.driver.AppleHPET 1.8 com.apple.driver.AppleACPIButtons 1.7 com.apple.driver.AppleSMBIOS 1.9 com.apple.driver.AppleACPIEC 1.7 com.apple.driver.AppleAPIC 1.6 com.apple.driver.AppleIntelCPUPowerManagementClient 196.0.0 com.apple.nke.applicationfirewall 4.0.39 com.apple.security.quarantine 2.1 com.apple.driver.AppleIntelCPUPowerManagement 196.0.0 com.apple.driver.DspFuncLib 2.3.7fc4 com.apple.iokit.IOAudioFamily 1.8.9fc11 com.apple.kext.OSvKernDSPLib 1.6 com.apple.driver.IOPlatformPluginLegacy 1.0.0 com.apple.driver.AppleSMBusPCI 1.0.11d0 com.apple.driver.IOPlatformPluginFamily 5.3.0d51 com.apple.driver.AppleBacklightExpert 1.0.4 com.apple.driver.AppleSMBusController 1.0.11d0 com.apple.kext.AMD4600Controller 8.1.2 com.apple.kext.AMDSupport 8.1.2 com.apple.iokit.IOSurface 86.0.4 com.apple.iokit.IOSerialFamily 10.0.6 com.apple.iokit.IOBluetoothFamily 4.1.4f2 com.apple.driver.AppleGraphicsControl 3.4.5 com.apple.iokit.IONDRVSupport 2.3.7 com.apple.iokit.AppleBluetoothHCIControllerUSBTransport 4.1.4f2 com.apple.kext.triggers 1.0 com.apple.iokit.IOFireWireIP 2.2.5 com.apple.driver.AppleSMC 3.1.4d2 com.apple.driver.AppleHDAController 2.3.7fc4 com.apple.iokit.IOGraphicsFamily 2.3.7 com.apple.iokit.IOHDAFamily 2.3.7fc4 com.apple.iokit.IOUSBHIDDriver 5.2.5 com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.5.5 com.apple.iokit.IOBDStorageFamily 1.7 com.apple.iokit.IODVDStorageFamily 1.7.1 com.apple.iokit.IOCDStorageFamily 1.7.1 com.apple.iokit.IOSCSIBlockCommandsDevice 3.5.5 com.apple.iokit.IOUSBMassStorageClass 3.5.1 com.apple.driver.AppleUSBMergeNub 5.5.5 com.apple.driver.AppleUSBComposite 5.2.5 com.apple.iokit.IOAHCISerialATAPI 2.5.1 com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.5 com.apple.iokit.IOUSBUserClient 5.5.5 com.apple.iokit.IOFireWireFamily 4.5.5 com.apple.iokit.IO80211Family 530.4 com.apple.iokit.IOAHCIFamily 2.3.1 com.apple.iokit.IONetworkingFamily 3.0 com.apple.iokit.IOUSBFamily 5.6.0 com.apple.driver.NVSMU 2.2.9 com.apple.driver.AppleEFIRuntime 1.7 com.apple.iokit.IOHIDFamily 1.8.1 com.apple.iokit.IOSMBusFamily 1.1 com.apple.security.sandbox 220.3 com.apple.kext.AppleMatch 1.0.0d1 com.apple.security.TMSafetyNet 7 com.apple.driver.DiskImages 345 com.apple.iokit.IOStorageFamily 1.8 com.apple.driver.AppleKeyStore 28.21 com.apple.driver.AppleACPIPlatform 1.7 com.apple.iokit.IOPCIFamily 2.7.3 com.apple.iokit.IOACPIFamily 1.4 com.apple.kec.corecrypto 1.0 Model: iMac10,1, BootROM IM101.00CC.B00, 2 processors, Intel Core 2 Duo, 3.06 GHz, 4 GB, SMC 1.53f13 Graphics: ATI Radeon HD 4670, ATI Radeon HD 4670, PCIe, 256 MB Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631 Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x802C, 0x31364A53463235363634485A2D3147314631 AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.72.0-P2P Bluetooth: Version 4.1.4f2 12041, 2 service, 18 devices, 1 incoming serial ports Network Service: Ethernet, Ethernet, en0 Network Service: AirPort, AirPort, en1 Serial ATA Device: Hitachi HDE721010SLA330, 1 TB Serial ATA Device: HL-DT-ST DVDRW GA11N USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0x24400000 / 2 USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0x26500000 / 2 USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x04500000 / 4 USB Device: USB Keyboard, 0x04f2 (Chicony Electronics Co., Ltd.), 0x0111, 0x04300000 / 3 USB Device: Microsoft Notebook Optical Mouse with Tilt Wheel, 0x045e (Microsoft Corporation), 0x00d2, 0x04100000 / 2 USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06100000 / 2 USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0x06110000 / 3

That panic was not caused by third-party software. If the problem is recurrent, the possibilities are:
A stale or corrupt kernel cache
A damaged OS X installation
A fault in a peripheral device, if any
Corrupt non-volatile memory (NVRAM)
An internal hardware fault (including incompatible memory)
An obscure bug in OS X
You may already have ruled out some of these.
Rule out #1 by booting in safe mode and then rebooting as usual. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
You can rule out #2 and #3 by reinstalling the OS and testing with non-essential peripherals disconnected and aftermarket expansion cards removed, if applicable. Sometimes a clean reinstallation (after erasing the startup volume) may solve a problem that isn't solved by reinstalling in place, without erasing.
Corrupt NVRAM, which rarely causes panics, can be ruled out by resetting it.
If your model has user-replaceable memory, and you've upgraded the memory modules, reinstall the original memory and see whether there's any improvement. Be careful not to touch the gold contacts. Clean them with a mild solvent such as rubbing alcohol. Aftermarket memory must exactly match the technical specifications for your model. Memory that is either slower or faster than specified may be incompatible.
The Apple Hardware Test or Apple Diagnostics, though generally unreliable, will sometimes detect a fault. A negative test can't be depended on. Run the extended version of the test.
In the category of obscure bugs, reports suggest that FileVault may trigger kernel traps under some unknown conditions. Most, though not all, of these reports seem to involve booting from an aftermarket SSD. If those conditions apply to you, try deactivating FileVault.
Connecting more than one display is another reported trigger for OS X bugs.
If your system is not fully up to date, running Software Update might get you a bug fix.
In rare cases, a malformed network packet from a defective router or other network device can cause panics. Such packets could also be sent deliberately by a skillful attacker. This possibility is something to consider if you run a public server that might be the target of such an attack.
If none of the above applies, make a "Genius" appointment at an Apple Store to have the machine tested. You may have to leave it there for several days. There isn't much point in doing this unless you can reproduce the panic, or if you can't, it happens often enough that it's likely to be repeated at the store. Otherwise you may be told that nothing is wrong.
Print the first page of the panic report and bring it with you.
Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you know how to restore, and you have at least two independent backups.) Don’t erase the recovery partition, if present.
Keeping your confidential data secure during hardware repair
*An SSD doesn't need to be zeroed.

My WD elements external hard drive has slowed down so much since upgrading - PLEASE HELP ME!!!

I am in external hard drive **** - someone please help!
I use my external hard drive as my music drive, and since upgrading to mountain lion something has gone wrong, and I have no idea what.
Basically it is incredibly slow at everything - appearing in finder, showing its contents, and copying from or to it. This is a problem that has only happened since my upgrade. I have tried to verify and repair it, but each time this happens it simply tells me every thing is OK! The only message I get is
'Updating boot support partitions as required.'
But this happens each time! I have no idea what this means (i am happy in my ignorance about computers most of the time)
I dont think that there is a problem with my hard drive, because I have seen the speed of my USB memory stick reduce in this time too, and if I leave it connected for long enough, it eventually finds all my files and folders and I can use them just fine. Its as if my USB ports speeds have all degraded very fast, for no particular reason. It has to be something to do with mountain lion...
Anyway, any ideas guys and gals? Please help me!

Basically I thought that mackeeper would keep everything nice and clean...
That's what the con-artist developer wants you to think, and it's the exact opposite of the truth.
How to maintain a Mac
1. Make redundant backups, keeping at least one off site at all times. One backup is not enough. Don’t back up your backups; make them independent of each other. Don’t rely completely on any single backup method, such as Time Machine. If you get an indication that a backup has failed, don't ignore it.
2. Keep your software up to date. In the Software Update preference pane, you can configure automatic notifications of updates to OS X and other Mac App Store products. Some third-party applications from other sources have a similar feature, if you don’t mind letting them phone home. Otherwise you have to check yourself on a regular basis. This is especially important for complex software that modifies the operating system, such as device drivers. Before installing any Apple update, you must check that all such modifications that you use are compatible.
3. Don't install crapware, such as “themes,” "haxies," “add-ons,” “toolbars,” “enhancers," “optimizers,” “accelerators,” “extenders,” “cleaners,” “defragmenters,” “firewalls,” "barriers," “guardians,” “defenders,” “protectors,” most “plugins,” commercial "virus scanners,” "disk tools," or "utilities." With very few exceptions, this kind of material is useless, or worse than useless.
The more actively promoted the product, the more likely it is to be garbage. The most extreme example is the “MacKeeper” scam.
As a rule, the only software you should install is that which directly enables you to do the things you use a computer for — such as creating, communicating, and playing — and does not modify the way other software works. Never install any third-party software unless you know how to uninstall it.
The free anti-malware application ClamXav is not crap, and although it’s not routinely needed, it may be useful in some environments, such as a mixed Mac-Windows enterprise network.
4. Beware of trojans. A trojan is malicious software (“malware”) that the user is duped into installing voluntarily. Such attacks were rare on the Mac platform until sometime in 2011, but are now increasingly common, and increasingly dangerous.
There is some built-in protection against downloading malware, but you can’t rely on it — the attackers are always at least one day ahead of the defense. You can’t rely on third-party protection either. What you can rely on is common-sense awareness — not paranoia, which only makes you more vulnerable.
Never install software from an untrustworthy or unknown source. If in doubt, do some research. Any website that prompts you to install a “codec” or “plugin” that comes from the same site, or an unknown site, is untrustworthy. Software with a corporate brand, such as Adobe Flash Player, must be acquired directly from the developer. No intermediary is acceptable, and don’t trust links unless you know how to parse them. Any file that is automatically downloaded from a web page without your having requested it should go straight into the Trash. A website that claims you have a “virus,” or that anything else is wrong with your computer, is rogue.
Because of recurring security issues in Java, it’s best to disable it in your web browsers, if it’s installed. Few websites have Java content nowadays, so you won’t be missing much. This action is mandatory if you’re running any version of OS X older than 10.6.8 with the latest Java update. Note: Java has nothing to do with JavaScript, despite the similar names. Don't install Java unless you're sure you need it. Most users don't.
5. Don't fill up your boot volume. A common mistake is adding more and more large files to your home folder until you start to get warnings that you're out of space, which may be followed in short order by a boot failure. This is more prone to happen on the newer Mac notebooks that come with an internal SSD instead of the traditional hard drive. The drive can be very nearly full before you become aware of the problem. While it's not true that you should or must keep any particular percentage of space free, you should monitor your storage consumption and make sure you're not in immediate danger of using it up. According to Apple documentation, you need at least 9 GB of free space on the startup volume for normal operation.
Use a tool such as the free application OmniDiskSweeper to explore your volume and find out what's taking up the most space. Move rarely-used large files to secondary storage.
6. Relax, don’t do it. Besides the above, no routine maintenance is necessary or beneficial for the vast majority of users; specifically not “cleaning caches,” “zapping the PRAM,” "resetting the SMC," “rebuilding the directory,” “running periodic scripts,” “deleting log files,” “scanning for viruses,” or “repairing permissions.” Such measures are for solving problems as they arise, not for maintenance.
The very height of futility is running an expensive third-party application called “Disk Warrior” when nothing is wrong, or even when something is wrong and you have backups, which you must have. Disk Warrior is a data-salvage tool, not a maintenance tool, and you will never need it if your backups are adequate. Don’t waste money on it or anything like it.

Wifi chip defective since updates please help someone

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