2008 Imac apple hardware test

I have a 2008 24" Imac running 10.7.5, my boot rom version is IM91.008D.B08, and my SMC version is 1.37f3. I'm trying to run the Apple Hardware Test but I'm not having any success; I depress the d key but it just restarts normally, same with option d. I checked out the firmware version and Apple says it's up to date. Maybe it's not possible? Thanks, mj.

Unless disc 2, "Applications Install DVD," states to use the D key on start up to launch AHT, you can't and need to use the disc. If the disc says to use the D key, then you need to restore the .diagnostics folder that Lion apparently blew away.
To do that, mount disc 2, launch the Terminal app in /Utilities, copy & paste this command into the window that pops up, and hit the return key:
defaults write com.apple.finder AppleShowAllFiles 1
OPTION-click & hold the Finder's Dock icon and select RELAUNCH. That unhides all hidden files/folders.
Drill down to /"Applications Install Disc"/System/Library/CoreServices/ and drag the .diagnostics folder into your SL boot volume's /System/Library/CoreServices/ folder.
Run this command to hide the normally hidden files/folders and RELAUNCH the Finder again.
defaults write com.apple.finder AppleShowAllFiles 0
Restart the machine and you should be able to boot into AHT when restarting and holding down the D key.

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2008 iMac running beautifully untill recently. Screen glitches and freezing. Apple Hardware test showed error code 4MOT/2/40000004:ADD and I have not seen others with this code. Guessing it is a fan issue based on the ODD and HDD error codes

computer felt hot and while running apple hardware test the screen glitches covered the screen and it froze. Now computer wont boot up. Again AHT code is 4MOT/2/40000004:ADD and I have just seen ODD and HDD codes discussed on other threads.Those were hardrive or superdrive fans, so I am guessing this is a fan issue and then it fried by graphics card. Any help as to whether this is game over or worth repairing would be very appreciated.

You need to take it to your local Apple Store or AASP for a professional evaluation. Apple does not publish the codes from AHT, you can Google the code you got and see if you can determine what it means however the best method is to let a pro handle it.

I want to run apple Hardware Test but can't find it on any CD's. I bought my iMac in 2009. I think it had 10.4 installed. It's not on my installation disk. Where can I find it?

I want to run Apple Hardware Text but can't find it on any CD's. I bought my iMac in 2009. It came with 10.4. Apple Hardware Test is not on the installation disk. Should I have it? Where can I find it? I"m now running 10.7.4.

The disc plainly state:
To use the AHT, hold down the D key as the computer starts up.
Works here. However, there was an issue with installing Lion that screwed this process up.
Mount disc 2, run this command in the Terminal app, OPTION-click & hold Finder's Dock icon, and select RELAUNCH:
defaults write com.apple.finder AppleShowAllFiles 1
That unhides all hidden files/folders.
Now, drill down to /"Applications Install\ Disc"/System/Library/CoreServices/ and drag the .diagnostics folder into your Lion boot volume's /System/Library/CoreServices/ folder. That might require you to authenticate to copy the folder into the CoreServices subfolder.
Run this command to hide the normally hidden files/folders and RELAUNCH the Finder again.
defaults write com.apple.finder AppleShowAllFiles 0
This should allow the machine to boot into AHT when restarting and holding down the D key.
If that doesn't do the trick, run this command in the Terminal app:
sudo chown -R root:wheel /System/Library/CoreServices/.diagnostics
At the Password: prompt, carefully type in your admin password, since nothing shows up on the screen, and hit the return key. Then, try another restart, holding down the D key.

Apple Hardware Test on a late 2008 MBP new HDD

Hey Community!
I own a Mac Book Pro - Late 2008 shipped with OSX 10.5.5. Currently I a new 500GB HDD and a 265 SDD are running in my MBP. The Super Drive is in an external USB Housing. Current OS X is version 10.7.1.
I need to run the Apple Hardware Test, because sometimes the system seems to freeze for at least 30 seconds.
What I've already tried:
*) Holding down "D" at the startup -> nothing happens, normal startup
*) setting start volume to external fire wire optical drive, insert 10.5.5. Installation disc, restart, holding down "D" -> startup with installation wizard
*) same with 10.6 Installation disc
*) same with choosing the Backup Partition when holding down "Alt" at startup and then pressing "D"
Always, I was connected via WIFI and Ethernet.
Can someone give me an advise how to run the Apple Hardware Test, or how to reinstall it on the new SDD Harddrive, where my system is mounted?
Thank u and greetings from Austria
Claudio

Try using your disk utility to read the drives. I'm not at my computer now but if you go into utilities->disk utility you might be able to solve it from there.
Also try holding down the C key on boot or esc.

Imac 24 aluminum - apple hardware test using wireless keyboard

The manual that came with my imac describes the steps to run the apple hardware test as follows:
1. disconnect all external devices, except keyboard and mouse
2. restart mac holding the 'd' key
The apple hardware chooser should appear next.
When I do these steps it goes right to my desktop every time. I am running a mac wireless keyboard and mac mighty mouse.
Anyone have an idea how I can get the Apple Hardware Test up?
Thanks.
Message was edited by: pathfinder31

Hi,
It can take a few minutes for the AHT to appear after booting, D key, etc:
http://support.apple.com/kb/HT1509
Try shutting down your iMac, reboot and THEN do the AHT.
Are you able to boot from the restore disk?
To check the hard disk:
Open Disk Utility, in the Utilities folder in the Applications folder.
Insert your Mac OS X Install disc in your computer’s optical drive or an optical drive connected to your computer, and then restart your computer. When you hear the startup tone, hold down the C key until you see the progress indicator, which looks like a spinning gear.
Follow the onscreen instructions until the Menu Bar appears with the Utilities menu in it, choose Utilities > Disk Utility, click First Aid, and then click the Verify button. If DU reports errors, click Repair. When it's finished, from the Menu Bar, select Utilities/Startup Disk. In the Startup Disk window select MacintoshHD 10.x.x and click Restart.
Carolyn

Apple Hardware Test Unavailable? Mac Pro 2008, Mavericks installed

Restarting my early 2008 Mac Pro with Mavericks installed while holding down the "D" key and it's just booting up like normal. Tried holding it before it shuts down, holding it after the startup tone, and holding it after the grey screen appears (which the apple site says is wrong).
Any suggestions?

That will only work with the original discs that came with the computer.
How to invoke and interpret the Apple hardware tests | MacFixIt - CNET Reviews
Using Apple Hardware Test

How do I run Extended Apple Hardware Test imac 21.5 mid-2010 mavericks

How do I run Extended Apple Hardware Test imac 21.5 mid-2010 mavericks? I have tried to start my computer holding down the "D" key but my iMac simply just restarts as normal.
I have checked the list of iMacs that can be upgraded to do an internet Extended Apple Hardware Test and I do not have one of those computers.
I cannot find any solution as yet.
I do not have the start up disks or the usb disks.

You can't run the hardware test without the installation discs.
Runaway applications can shorten battery runtime, affect performance, and increase heat and fan activity

HT201257 I just bought an imac in september 2012. And i just find out that my microphone is not working. So i did an apple hardware test and with no problems found? I have sound but no one can hear me, not even the computer. Should i bring it back to

I just bought an imac in september 2012. And i just find out that my microphone is not working. So i did an apple hardware test and with no problems found? I have sound but no one can hear me, not even the computer. Should i bring it back to the store

Before you go through that trouble open About this Mac > More Info... > System Report > Audio and see if the system actually knows it has a microphone. Then you can look into Applications > Utilities > Audio MIDI Setup and see if the microphone is there, select it and make sure the sliders are set to full. Then in System Preferences look for Sound > Input and make sure it shows up there and the sliders are at least half way up. If none of that works do a
SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
It is the 5 second timing that initiates the reset.
then go through the process of looking for the microphone again as the reset may reenable the mic.

My Mid-2011 iMac with pre-installed Lion can't load AHT (Apple Hardware Test) over internet

I have a Mid-2011 iMac (3.4GHz) of which Apple's Support document for the Apple Hardware Test (http://support.apple.com/kb/ht1509) says:
Some Macintosh computers that shipped with OS X Lion support the use of Apple Hardware Test over the Internet. These computers will start up to an Internet-based version of AHT if the hard drive does not contain AHT.
Well, this doesn't work for me. My Mac is on a DHCP-supporting router which has constant internet connection. Yet, when I turn off the Mac and then on again, holding the D key down even before the screen turns on, the Mac does indeed react to this key as it's then turning the screen on and taking another about half minute before it continues with the boot process along with showing the Mac symbol. Without the D, the Mac symbol comes up quickly.
So, it appears that the iMac is indeed trying to get AHT over the internet. Just that it doesn't succeed in it, and probably timing out after a while.
Any suggestions how to fix this?

Re
extract from kb article
PPPoE (where there is no router handling the PPPoE connection)
No
No
Captive-Networks (where you click an "Agree" button to access the Internet)
Yes
No
Proxies (where specific proxy servers must be configured in network preferences)
No
No
Certificate-based authentication / 802.1x
No
No
try check if you are in that case for your internet acces ?
could be a firewall problem too , if is possible try desable firewall ( or any internet filter )
no you can not see a wifi selection if you are wired ( using cable )
by the way D key for AHT need to be pressed AFTER start up sound , and hold at min one minute
HTH
Pierre

Apple hardware test does not support this machine, iMac 27" mid 2010

Hi, I have a mid 2010 iMac 27inch with OSX Maverics updated to the very latest version.
I need to hardware test my mac but I am finding it impossible. If I press D at bootup, nothing.
Option D, loads hardware test, but it comes back saying:
"Apple hardware test does not support this machine."
I don't have the original install disk for the mac and it has been updated several times online to the latest version. What am I supposed to do in this instance?

That Mac model requires the original system disk to run AHT. You can call Apple at 1-800-MYAPPLE, and ask for an operating system specialist. Then you can request replacement system disks for your computer. The cost us usually under US$20.
Have your serial number at hand; it is required for the techs to find the correct disk set for your model.

Apple Hardware Test Question on iMac

I did an advanced Apple Hardware test on my 09 iMac today to test it and to see what was making the buzzing sound. The advanced test revved up each fan when it tested the logic board and I can say it is the lower left fan making the buzzing, however once it reaches 2000+ RPM the buzzing goes away.
The question i want to ask is after the test the optical drive fan stayed revved up at over 2000 RPM for a few minutes after the computer restarted, unlike the other two fans that went back to normal this fan took atleast 3 mins to go back down to normal rpms. Is this normal?
Thanks
Also does the HDD run when in a hardware test? as now and then during the test I heard a weird static sound coming from the HDD.

I looked at iStat after restarting from the test and it showed that only the optical drive fan was running at high speed after the test, with the slight buzzing fan still buzzing at low speed. I could hear that the optical drive fan was slowly revving down getting slower and slower, iStat showed it was as well and now its back to normal rpm and not revved anymore. I just thought all fans would return to normal after the test unless the optical drive got hot during the test.
The buzz is not too bad and is only noticeable in a quite room but I'm more concerned about the random grind/static sound the HDD is making ever so often. The sound is very quiet but can still be heard but i don't know what it is, well I know its not the sound of a HDD breaking as I know what that hears like.

Apple Hardware Test Non-existent on Imac 27" i5 with preinstalled Lion!!

Have just spent nearly 30 mins on the phone with AppleCare because I can't seem to get the Apple Hardware Test on my iMac to work. Checked in instructions and it states "Restart iMac while holding down D key" - that does not work. Then it states, "if the Apple Hardware Test window doesn't appear after restarting, hold down the Command, Option and D keys and restart the computer to access the AHT software from the internet". That doesn't work either. When talking to AppleCare the chap told me to use my disk - don't have one! Went through the same thing I tried from instructions and still doesn't work. Has anyone tried using the AHT with Lion preinstalled? Have you got it to work, or is it just me?
Any help/advice much appreciated.

Thanks for your reply. It seems that some iMacs running Lion are able to run AHT or gain access to an Internet version. I, unfortunately, am unable to do either. There is nothing in the instruction book relating to non-access to AHT if you are running a pre-installed version of Lion. Perhaps Apple should have at the very least included an info sheet stating what Lion runs and does not run! The more I find out what has changed in Lion the less I like it. I have had iMacs since the revised G3 which I think was back in 1998. I have had several iMacs since then and really liked all of them. This one I don't. If I can find a way of running Snow Leopard, I will junk Lion.

Possible to create system software disc on USB flash drive to start Apple Hardware Test on mid 2009 iMac running OS X 10.9

Is it possible to create a system software disc on a USB flash drive to start Apple Hardware Test on mid 2009 iMac running OS X 10.9?

Hopefully, those dvd's are the correct ones. If not, it's possible to download the AHT for many models from Apple, & either make a bootable drive, or replace the files in the hidden /System/Library/CoreServices/.diagnostics folder.
see Download and run Apple Hardware Test (AHT) from a USB drive.
There are additional download details in the comments for some later models.

IMac intel late 2006, lost DVDs, how to run apple hardware test

Hello, Applers,
I have an iMac intel core 2 duo late 2006. I have upgraded it to snow leopard. From two months ago, it began to show distorted pictues, random lines/pixels/, and regular freezing. But if I boot it into the safe mode, it works well, although there is no sound or webcam. I did a research online and it seems that I should run apple hardware test (AHT) first. But the DVDs came withi this machines have been lost. where can I download this software? I would greatly appreciate your help if any of you who also have this model of machine and would like to lend me your DVDs.
any suggestions are welcome.

You can purchase replacements from AppleCare:
Apple Store Customer Service at 1-800-676-2775 or visit online Help for more information.
To contact product and tech support visit online support site.
There is no way to run the AHT without the discs.
If it works OK in safe mode then you might think about:
Resetting your Mac's PRAM and NVRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
Reinstall Snow Leopard:
Reinstall OS X without erasing the drive
Do the following:
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install the Combo Updater for the version you prefer from support.apple.com/downloads/.

Imac wont start after electricity went off, no power surge. Apple Hardware Test ,no trouble found, please can anyone help,thanks ,Andy

Hi, please can anyoner help. I had a power cut at home and went to switch the imac back on and all i can get is a grey screen, a chime and a circle going around but no blue screen when I start up .I have tried pressing the power button for ten seconds with it switched off .Tried installing back up discs and after about an hour it comes up with an error that caused installation to fail and to contact the software manufacturer, tried again and the same happened. Tried apple hardware test and test results say no trouble found so am trying the extended test .any help would be great, thanks,Andy.

Try resetting the smc and pram.
To reset the smc
Shut down the computer.
Unplug the computer's power cord.
Wait fifteen seconds.
Attach the computer's power cord.
Wait five seconds, then press the power button to turn on the computer.
To reset pram
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

2008 Imac apple hardware test

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