Wifi dropping (27-inch, Late 2012)

Hi,
I purchased a late-2012 iMac a few months ago (brand new, from a physical Apple store), and since I've had it, it's had this problem of randomly dropping my wifi connection.
I've googled this issue and it seems to be a common thing. I've tried a couple different solutions (e.g. creating a new Location in Network preferences; setting the Service Order so that Wi-Fi is on top; changing the Wi-Fi Hardware MTU from 1400 to 1500), but none seem to fix the problem permanently.
Last night, I was trying to upload a 10mb file over FTP and my wifi connection was dropped every minute (no exaggeration), so I quit and tried again this morning. Sometimes it happens frequently, like last night, other times it'll happen maybe once in the day.
Has anyone else encountered this wifi dropping issue with their iMac, and if so, what have you tried to fix this problem?
Thanks,
Derek

I have been having this problem with just one of our iMacs in our house. I went through Apple support and navigated through all the twists and turns they suggestedto try to get the problem solved. NOTHING WORKED. THEY DON"T KNOW HOW TO FIX THIS PROBLEM. BUT I DO! Unfortunately it involves buying a $30 wireless ethernet adapter (I got an IOGEAR, and I have no connection to their company. Probably any wireless ethernet adapter will work). I turned off the internal airport wireless device and through the network settings in the system preferences connected to my CISCO LYNKSYS ROUTER (which has been bashed left and right in the forums here). THE PROBLEM IS SOLVED!!!!! NO RESTARTING!!! NO DROPPED CONNECTIONS!!!!
So the problem isn't with the router, its with the airport wireless adapter in the iMac. It ***** to have to spend more money after you lay out so much for an apple product, but it sure beats restarting the computer over and over every day.
Hope this helps my friends out there. I can now allow my hair to repopulate my head since I've been pulling it out over this issue for months.

Similar Messages

WiFi drops with iMac (late 2012)

I have an iMac 27" late 2012 model. We changed our broadband provider from ADSL to cable. Due to this change, the router (i.e. WLAN AP) is further away than before. The signal is weak with the iMac (-75 dBm / -87 dBm). Worse, every other few minutes, the signal gets lost. This could be accepted if my Retina MacBook Pro, my iPhone or my old iPad 1 showed the same behaviour. Interestingly, those devices work fine at the same location where the iMac is located. - Due to the 27" screen, I would have expected the opposite as the antenna of the iMac is much larger... - I suspect that the Airport Extreme adapter of the iMac is not working properly (using Firmware Broadcom BCM43xx 1.0 (5.106.98.100.22))
Any ideas how I can get a stable network connection?

Which version of OS X?
Try making a new network location as shown under the heading 'Making new locations' in this link:
http://support.apple.com/kb/HT5289
Try the 'fixes' suggested in this link which seem to help some, but not all, users with Lion or Mountain Lion installed. Also check the links within the article:
http://osxdaily.com/2011/11/06/lion-wi-fi-problems-solution-mac/?utm_source=feed burner&utm_medium=feed&utm_campaign=Feed%3A+osxdaily+%28OS+X+Daily%29&utm_conten t=FaceBook

How do I upgrade (via Apple) SSD (to 500 GB or 1 TB) on Macbook Pro Retina 13-inch, Late 2012

How do I upgrade (via Apple) SSD (to 500 GB or 1 TB) on Macbook Pro Retina 13-inch, Late 2012.
I want to know how much Apple will charge for this (if they even do this since I don't see it on their website).

Apple does not upgrade parts of a machine - they'll have it repaired under warranty, but no upgrades. You can, however, take it to an authorized service provider; no idea how much they would charge.
You can also do this yourself - here is an installation video:
http://eshop.macsales.com/installvideos/macbookpro_13_retinadisplay_late12_unibo dy_ssd/
I bought one of their SSDs and installed it in my 2012 MBP (not retina) - very easy to do. If you want to go this way, post back for instructions on how to clone your current drive which will make things super easy.

HT3924 How would this apply if you have a MacBook Pro Retina, 13-inch, Late 2012?

How could I use my iMac 27" Mid 2010 as an external monitor for my MacBook Pro Retina, 13-inch, Late 2012?
I have an HDMI to HDMI but nothing happens.

You use Target Display Mode via Thunderbolt cable.
Target Display Mode And Thunderbolt
Target Display Mode 2009 & 2010 iMacs
Target Display Mode 2011 & Later iMacs
iMac (Mid 2011)- Target Display Mode does not work with Mini DisplayPort cable

Does this shelf fit my iMac 27 inch late 2012

Hi,
Does the Twelve South BackPack 2 Adjustable Shelf fit my imac 27 inch late 2012?
I just ordered one from apple just now and noticed afterwards (should have read it all first) that it said not compatible with imac (fall 2012) models.
Is that me? I bought the imac in January 2013, it's the new slim model. Should I cancel the order or will it fit. I wanted it to hold the USB Superdrive out of sight?
Thanks, Crankyhead.

Best Buy carries that item (at least in this area) and they also have the iMacs, so I'd suggest going there and checking it out.
FWIW, there is no 2013 model iMac; anything sold at this time is the late/fall 2012 model. As for whether it fits or not - I don't have a late 2012; I bought a backpack for my mid 2010 and did not care for it (didn't appear to be solid enough to hold a hard drive which is probably heavier than a superdrive), so I returned it.

IMac (27-inch, Late 2012) i want to put ssd blade

iMac (27-inch, Late 2012)
3,2 GHz Intel Core i5
24 GB 1333 MHz DDR3
Hello I want to put SSD blade in my iMAC 27 , maybe someone of you know where to find the ssd blade finishing dig up the entire Internet , but do not understand , really that ssd . Suitable for MacBook Pro and MacBook in 2013 and also 2012? I planned put 512GB max 256GB Help me !!

The SSD blade drive is a very thin SSD that looks a lot like a memory module. It connects to a PCie slot instead of an HD sata port.
According to EveryMacs overview:
For storage upgrades, if the 21.5-Inch "Late 2012" iMac models were not configured with an SSD or a "Fusion Drive" at the time of purchase, there is no way to add a PCIe-based "blade" SSD later as the needed connector is not present. However, the 27-Inch "Late 2012" and all "Late 2013" iMac models do have this connector on the motherboard even without a pre-installed SSD, so it is possible to add a PCIe-based "blade" SSD after the purchase of the system.
http://www.everymac.com/systems/apple/imac/imac-aluminum-tapered-edge-faq/differ ences-between-imac-aluminum-late-2012-late-2013-models.html
One of these should work:
http://www.newegg.com/Product/ProductList.aspx?Submit=Property&N=100008120%20600 038516%20600038517%20600038515%20600489717%20600171532%20600171533%20600488413&I sNodeId=1&name=M.2
With that said you will have to completely disassemble the iMac to install an SSD blade in it. That means not only removing screws, but also glue, and other securing mechanisms, not easily removed.

Why does my fan blast full power after shutdown?3.4 GHz Intel Core i7/OS X 10.9/27-inch, Late 2012

A couple of seconds after shutdown my fan at the rear of the machine starts. and does not stop until I unplug power at the socket. The fan is almost as loud as a bathroom hand dryer..... Yup !? Any one out ther with any ideas please help. Mac support were sweet but pretty ineffectual.
iMac 3.4 GHz Intel Core i7/OS X 10.9/27-inch, Late 2012
Thanks.

A couple of seconds after shutdown my fan at the rear of the machine starts. and does not stop until I unplug power at the socket. The fan is almost as loud as a bathroom hand dryer..... Yup !? Any one out ther with any ideas please help. Mac support were sweet but pretty ineffectual.
iMac 3.4 GHz Intel Core i7/OS X 10.9/27-inch, Late 2012
Thanks.

IMac (27-inch, Late 2013) with iMac (27-inch, Late 2012) in TDM issue

With the late-2013 iMac 27" (3.5 GHz, 32 GB RAM, 3 TB Fusion, Mavericks 10.9.4) as the primary and the late-2012 iMac 27" (3.4 GHz, 16 GB RAM, 3 TB Fusion, Yosemite Beta 10.10) in TDM, the screen on the target display blinks off and on (goes black and comes right back after a split second). It happens intermittently, regardless of which Thunderbolt port is used to connect the two computers. The other Thunderbolt port on the primary is used to connect two external FW800 drives via a Thunderbolt-to-FW800 adapter.
Through exhaustive testing, and in constant consultation with AppleCare senior advisors, I have seemingly ruled out all obvious potential hardware or software culprits:
An AVR is feeding both computers consistent power.
Each computer's RAM and video cards have been tested with TechTool Pro 7: everything passed.
The Thunderbolt cable has been replaced.
Reset the NVRAM and SMC on both computers (though with all the testing I've done since, it might not hurt to do this again).
Both computers have been running the latest version of OS X (the target display is currently running Yosemite Beta).
Made sure to enable TDM after the primary iMac has completed its full startup process.
Turned down the display brightness on both computers.
Trashed the com.apple.windowserver.plist file on the late-2013 iMac.
None of these steps have resolved the problem and I am having NO other issues with either computer. I'm stumped, as are the AppleCare senior advisors I've been working with. This issue has been present since I first connected these two computers this way. Design flaw not revealed in testing? Problem part not revealed in testing?
Anyone here seen anything like this or have any ideas of what else I can try? Help would be greatly appreciated!
Thanks,
Dana

Purchase a Windows PC?? Gasp, indeed! No, after months of software and hardware troubleshooting with an AppleCare senior advisor, and me refusing to believe my brand new 2013 iMac could have a hardware defect, I finally took my entire configuration (both iMacs, voltage regulator, back-UPS) in to my local Apple Store. They were able to replicate the issue, but then misdiagnosed the problem and replaced an internal display cable. Within minutes of reconnecting everything at home, the problem returned. So AppleCare sent an authorized service tech to my home to replace the logic board. That seems to have finally solved the problem. Inconveniently, the tech didn't have what he needed to flash the new logic board with my serial number right then, so I had to wait two weeks to get that done. It did finally get done though, and now all is well.
Good luck with your issue!

I have a MacBook Pro (13-inch, Mid 2010) and iMac (27-inch, Late 2012) - can I work between both?

I have been using my MacBook Pro for several years and still use it on-the-go but at home now I have the Late 2012 iMac, I bought a Thunderbolt cable but found it wouldn't work with the MBP.
When I'm working on the laptop - and I return home - is there a way I can then transfer the work to the iMac and vise-versa.
Obviously cloud services like Dropbox exist but I'm looking for an alternative as I transfer quite a lot of files.

Hi there,
The simplest way is to drag it across wirelessly using the 'Airdrop' application once both computers are near one another. 'Airdrop' can be found near the top, on the left hand side menu, within 'Finder'.
AJ

Can i upgrade my RAM on my MacBook Pro Retina 13 inch late 2012?

Hello,
Since yesterday i keep getting a screen which says my Program memory is low. and it keeps pausing the programs which are currently open.
then it gives me the option to force quit them. I also did disk utility. i cleaned languages which i don't need on my macbook. and i also cleaned my Cache.
I went from like 21 GB to 33 GB free of 120 GB.
Later i got an message again. so i'm really wondering if i should upgrade my RAM. its 8 GB 1600 Mhz.
As im a graphic designer i only use adobe programs. i don't got films or anything like that which could be the problem of a lot of disk space.
So i really don't know how this is possible.
Greetings,
Lars

Hey braunfrommr,
Thanks for the question. I understand you are experiencing issues with charging your MacBook Pro. The following resource may provide a solution:
OS X Mavericks: If your battery won’t charge
http://support.apple.com/kb/PH14257
Thanks,
Matt M.

MacBook Pro Retina, 13-Inch, Late 2012. Not Charging

Hey guys, I just bought this MacBook about 4 months ago and all of sudden, it doesn't wanna charge. I have two adapters and they both work. The problem with my MacBook is when I plug in the adapter piece, it shows up as, "Battery not charging." Please help.
Battery Information:
Model Information:
Serial Number:          C013326098EF957AE
Manufacturer:          DP
Device Name:          bq20z451
Pack Lot Code:          0
PCB Lot Code:          0
Firmware Version:          511
Hardware Revision:          000a
Cell Revision:          1155
Charge Information:
Charge Remaining (mAh):          367
Fully Charged:          No
Charging:          No
Full Charge Capacity (mAh):          6254
Health Information:
Cycle Count:          180
Condition:          Normal
Battery Installed:          Yes
Amperage (mA):          0
Voltage (mV):          10892

Hey braunfrommr,
Thanks for the question. I understand you are experiencing issues with charging your MacBook Pro. The following resource may provide a solution:
OS X Mavericks: If your battery won’t charge
http://support.apple.com/kb/PH14257
Thanks,
Matt M.

Dead pixels on late 2012 27-inch iMac

i've been using the default configured starry Galaxy desktop wallpaper since i bought my iMac 27-inch late 2012 and today i noticed a small light spot near one of the small stars on the left side of my screen, it is mostly noticeable standing up and looking down at it when windows are open on that side, i.e. safari, finder windows, and on lighter solid-color backgrounds. it looks like dead pixels as opposed to dirt to me, but i dunno.

If you have had this new iMac for longer than 14 days, you can no longer return it for a replacement.
You might be able to get a new, replacement LCD panel installed under AppleCare, if this bothers you or you are just going to have to live with it.
There is a certain amount of dead pixels that determines if the LCD is good or defective.
Every LCD panel is prone to dead pixels. The pixel can be stuck "on" (white) or stuck "off" (black).
If this is the only pixel that you found that is dead, then it maybe considered OK and not defective.
If you had the LCD replaced, there is no guarantee you wouldn't get a replacement LCD with another or a few stuck pixels.
In the near future or before your free year of AppleCare expires, I would strongly consider budgeting, purchasing and registering with Apple for the 3-year extended AppleCare warranty plan. You will need it.

Late 2012 iMac Freezes every few days

My iMac has been in the Apple Store for a week with the Geniuses and they came back saying they couldn't find anything so putting this out to this community in the hope someone else can help. Here are the details.
Model: 21.5 inch Late-2012 iMac
RAM: 8Gb
Processor: 2.9Ghz Intel Core i5
Graphics: NVIDIA GeForce GT 650M 512 MB
Hard Drive: 1.12 Tb Fusion (653Gb free)
OS: 10.8.4
Software: Fairly vanilla with no MS or Adobe Apps. No system extensions or hacks installed.
Symptom: Every few days or so the iMac locks up. Certain running applications will still work but many common ones such as Pages, Aperture, App Store & TextEdit will hang when trying to open. Force Quitting them doesn't affect them. When I try to shut down the computer it goes to the grey screen and stays there. Eventually the power needs to be turned off to reboot it. This has been doing this for the last several months.
Solutions Tried:
- Fixed permissions
- Reset PRAM
- Re-install OS X
I can't replicate the crash but today it happened again. At around 3:50pm I went to the iMac and noticed that Pages wouldn't load. Force quitting the App didn't do anything. Aperture was not responding so force quit that. Still wouldn't re-open. Mail was working fine and I was able to send a test message. Safari worked fine. Launched System Preferences ok but could not launch TextEdit or App Store. Calendar opened and closed fine. Attempted to restart the Mac but got the grey screen and after 5 minutes of waiting turned the computer off & relaunched it.
Here is a snapshot of some Console entries:
5/09/13 2:27:41.316 PM coreaudiod[122]: Enabled automatic stack shots because audio IO is inactive
5/09/13 2:28:16.449 PM coreaudiod[122]: Disabled automatic stack shots because audio IO is active
5/09/13 2:28:17.262 PM coreaudiod[122]: Enabled automatic stack shots because audio IO is inactive
5/09/13 2:28:50.579 PM com.apple.usbmuxd[68]: _heartbeat_failed heartbeat detected detach for device 0xdf3-10.0.1.10:0!
5/09/13 2:37:54.690 PM com.apple.usbmuxd[68]: _heartbeat_failed heartbeat detected detach for device 0xdfc-10.0.1.10:0!
5/09/13 2:42:04.656 PM lsboxd[209]: @AE relay 61657674:6f646f63
5/09/13 2:47:21.156 PM com.apple.usbmuxd[68]: _heartbeat_failed heartbeat detected detach for device 0xe05-10.0.1.11:0!
5/09/13 4:03:23.428 PM com.apple.launchd[1]: *** launchd[1] has started up. ***
5/09/13 4:03:23.428 PM com.apple.launchd[1]: *** Shutdown logging is enabled. ***
5/09/13 4:03:24.934 PM com.apple.launchd[1]: (com.apple.automountd) Unknown key for boolean: NSSupportsSuddenTermination
5/09/13 4:03:26.157 PM airportd[30]: _processDLILEvent: en1 attached (down)
5/09/13 4:03:26.342 PM UserEventAgent[11]: Captive: [HandleNetworkInformationChanged:2435] nwi_state_copy returned NULL
5/09/13 4:03:26.609 PM fseventsd[39]: event logs in /.fseventsd out of sync with volume. destroying old logs. (419745 5 419906)
5/09/13 4:03:26.612 PM fseventsd[39]: log dir: /.fseventsd getting new uuid: A3689432-84D2-4FB0-8C25-0352BC004F8B
5/09/13 4:03:26.666 PM mDNSResponder[40]: mDNSResponder mDNSResponder-379.38.1 (Apr 25 2013 19:19:56) starting OSXVers 12
Notice that the last Console entry was at 2:47pm (in red) and then nothing. I went to use the computer at 3:50pm and did several actions on it. Plugged in iPad, opened iTunes. Copied a file from the iPad to the desktop. Prior to that it hadn't been used for several hours. The shutdown that I selected does not appear in the log (although it only managed to go to the grey screen rather than complete a full shut down).
Appreciate any clues at all here. This is very frustrating and has been going on for far too long.
TIA. Jordan

Back up all data immediately as your boot drive may be failing.
If you have more than one user account, these instructions must be carried out as an administrator.
Triple-click anywhere in the line below on this page to select it:
syslog -k Sender kernel -k Message CReq 'Channel t|GPU D|I/O|Previous Sh' | tail | open -ef
Copy the selected text to the Clipboard (command-C).
Launch the 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.
Paste into the Terminal window (command-V).
The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
A TextEdit window will open with the output of the command. If the command produced no output, the window will be empty. Post the contents of the TextEdit window (not the Terminal window), if any — the text, please, not a screenshot. The title of the window doesn't matter, and you don't need to post that.

How can I install windows 7 on imac 27 late 2012

I wanted to install windows 7 64 bit on a iMac 27 inch late 2012. Everything went smooth until it restarts. Then I get the following message.
Non-system disk
Press any key to reboot.
After this, there is no reaction. By the way, I don't have Fusion Drive. I have normal SATA drive.

Hey Guys,
I was able to start boot manager. I had 4 options:
1. Macintosh HD
2. Recovery-10.8.2
3. Windows
4. EFI Boot
I choose option 3 (Windows). But i got the following message.
CDBOOT: Couldn't find BOOTMGR
Any idea?

IMac-27inch model (late 2012) running slow after Mountain Lion 10.8.5 supplemental update

I have the iMac 27-inch (late 2012 model), 8GB RAM, 1TB Hard Drive. All of a sudden after the Mountain Lion 10.8.5 Supplemental update it started running like molasses (apps take forever to open, takes forever to wake out of sleep, long boot up times, etc.) I ran verify disk, verify disk permissions, etc. I found that when I ran verify disk permissions, it stated that the iTunes permissions weren't right so I repaired disk permissions, reboot, still same problem. Ran verify disk permissions again, once again iTunes permissions issues, repair disk permissions, restart, same problem over and over again like Ground Hog Day, please help...

First, back up all data immediately, as your boot drive might be failing.
Step 1
This diagnostic procedure will query the log for messages that may indicate a system issue. It changes nothing, and therefore will not, in itself, solve your problem.
If you have more than one user account, these instructions must be carried out as an administrator. I've tested them only with the Safari web browser. If you use another browser, they may not work as described.
Triple-click anywhere in the line below on this page to select it:
syslog -k Sender kernel -k Message CReq 'Channel t|GPU D|I/O|find tok|n Cause: -' | tail | open -ef
Copy the selected text to the Clipboard (command-C).
Launch the 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.
Paste into the Terminal window (command-V).
The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign (“$”) to appear.
A TextEdit window will open with the output of the command. Normally the command will produce no output, and the window will be empty. If the TextEdit window (not the Terminal window) has anything in it, stop here and post it — the text, please, not a screenshot. The title of the TextEdit window doesn't matter, and you don't need to post that.
Step 2
There are a few other possible causes of generalized slow performance that you can rule out easily.
Reset the System Management Controller.
If you have a portable computer, check the cycle count of the battery. It may be due for replacement.
If you have many image or video files on the Desktop with preview icons, move them to another folder.
If applicable, uncheck all boxes in the iCloud preference pane. See whether there's any change.
Disconnect all non-essential wired peripherals and remove aftermarket expansion cards, if any.
Check your keychains in Keychain Access for excessively duplicated items.
Boot into Recovery mode, launch Disk Utility, and run Repair Disk.
If you're booting from an aftermarket SSD, see whether there's a firmware update for it.
If you have a MacBook Pro with dual graphics, disable automatic graphics switching in the Energy Saverpreference pane for better performance at the cost of shorter battery life.
Step 3
When you notice the problem, launch the Activity Monitor 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 Activity Monitor in the icon grid.
Select the CPU tab of the Activity Monitor window.
Select All Processes from the menu in the toolbar, if not already selected.
Click the heading of the % CPU column in the process table to sort the entries by CPU usage. You may have to click it twice to get the highest value at the top. What is it, and what is the process? Also post the values for % User, % System, and % Idle at the bottom of the window.
Select the System Memory tab. What values are shown in the bottom part of the window for Page outs and Swap used?
Next, select the Disk Activity tab. Post the approximate values shown for Reads in/sec and Writes out/sec (not Reads in and Writes out.)
Step 4
If you have more than one user account, you must be logged in as an administrator to carry out this step.
Launch the Console application in the same way you launched Activity Monitor. Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Select the 50 or so most recent entries in the log. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V). You're looking for entries at the end of the log, not at the beginning.
When posting a log extract, be selective. Don't post more than is requested.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some personal information, such as your name, may appear in the log. Anonymize before posting. That should be easy to do if your extract is not too long.

Wifi dropping (27-inch, Late 2012)

Similar Messages

Maybe you are looking for