Apple Hardware Test-Where?

I am a new owner of an iMac Core Duo.
In this General iMac (Core Duo) forum, I have seen a few posts that mention Running A.H.T.
When I've bought previous Apple Computer models, they all came with a CD specific to that machine called "Apple Hardware Test". (Not the AppleCare Test CD, which is TechTool Deluxe).
Although my new iMac shipped with the restoration DVD's, I cannot find any disc that has AHT on it.
Should I have one? Is the Test, on one of the bootable DVD's, and I'm not seeing it?
I'd like to know how others are using A.H.T. with their Core Duo, and where they found it.
iMac Core Duo Mac OS X (10.4.7) 20", 2 Ghz, 250 HD, 1 GB RAM, 265 MB VRAM,

Hi Chris,
Take a close look at the 2 DVD's that came with your iMac
On the one labelled "iMac Mac OS X Install Disc 1" you will notice on the right hand side of the Disc it states "To use Apple Hardware Test hold down the D key as the computer starts up."
Alternatively, with the Disc inserted hold down the Option(alt) as the iMac starts up; this will take you to the Startup Manager screen where you will be able to select AHT as the startup volume.
RD

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Apple Hardware Test Problem Detected

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Help here > Mac notebooks: Apple Hardware Test may report SNS alert when power adapter is not connected

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.

Where do I find a list of error meanings for Apple Hardware Test?

I think My 27" mid 2011 iMac has a faulty thermostat on the ODD. I ran the Apple Hardware Test and the error message was 4M0T/4/40000002:ODD-0. Where can I learn what this error code actually means?

That error message means that there is a problem with the optical drive fan motor. I recommend you to make a backup of your files and take the Mac to an Apple Store or reseller in order to prevent any problem.
Here you can find a list of Apple Hardware Test messages -> http://www.macissues.com/2014/03/21/how-to-run-and-interpret-apples-hardware-tes ts-on-your-mac/

Where can I get an Apple Hardware Test CD? (for a dual 867mhz G4 powermac)

My Powermac G4 Dual 867mhz is having issues. It either won't boot to the 10.5 server DVD, or if It does, it hangs with the spinning gear.
Booting to the 10.5 workstation CD works great.
The 10.5 Server CD is good, as I've tested it on my G5.
I want to use an Apple Hardware Test CD to do some heavy-duty scanning, but I bought this G4 off eBay and have no original CD's. Where can I find them?

Hi-
Download a copy of the AHT here.
Burn it to CD, and off you go.

Where do I find the apple hardware test

Hi, I'm trying to find the apple hardware test. The article here: http://support.apple.com/kb/HT1509 does not help me - I've tried pressing the D key, but the test won't start. My version of Snow Leopard only has one DVD (10.6.3). I rebooted from the DVD and had a look in the Utility section, but could not find the AHT there either. Any help would be greatly appreciated!
Thanks in advance,
Veronika
Edit: OK, I see that it should be located on the original installation disks. However, I never had those - my Mac was once repaired under extended warranty (new harddrive), and they kindly upgraded me from Tiger to Leopard all those years ago. Any other ideas?

Replacement disc(s) from Apple: You can get replacement System Install & Restore CD/DVDs from Apple's Customer Support - in the US, (800) 767-2775 - for a nominal S&H fee. You'll need to have the model and/or serial number of your Mac available.

Where is Mountain Lion's Apple Hardware Test?

Hi. My Snow Leopard DVDs which are in good condition won't read anymore after installing Lion and now Mountain Lion (the Superdrives' working properly as I can burn CDs and DVDs. The DVD does see it as blank with Untitled DVD but .iso Linux images for example boot when you restart it). Apple may have intentionally made the Superdrive not be able to read original disks to favor USB Flash drives and the Cloud I'm guessing which is fine by me coz' those can never be damaged physically or are less prone to physical damage.
But the Apple Hardware Test is in the Applications DVD of the Snow Leopard. How do I run Apple Hardware Test then on Mountain Lion? Any third-party app that goes beyond what Apple Hardware Test can do that you could recommend?
Thank you in advance.
God bless.

I don't understand why your system is not recognizing the SL install disk - it should. The timing of any key combo with a restart is difficult with a wireless keyboard - unless the timing is perfect, it won't work. As suggested, try /borrow a USB keyboard.
Another thing to try is to insert the SL install disk; then go to Startup Disk Pane in System Preferences and see if your SL disk is listed in the choices. If it is, then select it and hit restart.
As for the question re. the bootable USB stick/DVD, I have not tried that, so I cannot say if that would work or not. Does your Mac have internet recovery or did you install the firmware for it as outlined here:
http://support.apple.com/kb/HT4904
Having read all I could find about recovery, there is no mention of any Apple Hardware Test; not even here (which is quite comprehensive):
http://pondini.org/OSX/RecoveryHD.html
The only things mentioned are the options in Disk Utility. So, unless you can boot from your SL install disk and get to the test that way, I am stumped. My suggestion would be to book an appointment at your nearest Genius Bar (if you are past the warranty) or call Apple support if you're still covered.

Error Code After Running Apple Hardware Test

I ran apple hardware test (I'm having problems where my computer freezes for like 10 seconds with the mouse being movable... but it happens very frequently. like once a minute. it's SOOO ANNOYING)
this is the error i got after running apple hardware test:
(it came out as a Mass Storage error... which is Hard Disk i guess)
**ERROR*CODE***ERROR*CODE**
2STF/8/3: S-ATA Bus 0-Master
**ERROR*CODE***ERROR*CODE**
Does anyone know what I can do to fix it. Apple Hardware Test only allows me to find the error and then restart or shut down... which is useless cause what is the error code supposed to mean. I've only got Apple 1 yr repair support left... so I cant call up Apple or anything. Does anyone know anything about this and what I could do to fix it!?
I know about this: http://www.apple.com/support/imac/repairextensionprogram/
I might go to the apple store, but I dont wanna make a trip out there for nothing.
Does anyone know what I can do or should I just take it to the apple store.

Actually, i just spent like 1 hr working with disk utility using the os x install disk and i think it finally worked. im so happy for myself! yay... i wouldnt accept no for an answer. Disk utility kept saying "oh first aid failed because it didnt exit right" or something... total garbage response... i kept pressing verify disk and then repair disk and then i did the verify permissions and repair permissions too... didnt really know what i was doing with the permissions... but it finally worked so thats all that mattered! yay... its back to normal!!

Won't Boot to Apple Hardware Test or accept Boot Commands

Hi All,
I would appreciate some help with this issue, I am trying to boot up to the Apple Hardware Test on my Install Disk 1 that shipped with my MacBook Pro 2.4GHz Model #A1226 ordered new with 4 gigs of memory (around Aug. 2007). I am currently running 10.5.6 and the install disk of course contains the Tiger OS. I have nothing plugging into my computer, other than the Power Adapter. I have the proper install disk inserted in the computer and am holding down the "d" key on my built in keyboard throughout startup, but it will not go to the AHT. It simply boots to the normal login screen for Leopard. In fact the only boot commands that I see any visible or audible confirmation that it has taken effect is the option key, taking me to selecting a Startup Manager and holding down the Power Button gives me a tone from the internal speaker after a few seconds.
Below are what I have tried with seemingly no effect:
"d"
"c"
"t"
Option-Command-"p"-"r" (no beeps)
Command-"v"
Command-"s"
Shift (not sure I should see or hear any confirmation, I don't have any login items set right now so I can't tell if it has any effect)
I have not tried an of the networked drive boot commands as I don't have any networked drives
The only way I have been able to boot from either the optical drive or another disk is either holding down the option key during boot up or selecting the drive from the startup manager in system preferences.
I can't seem to access the AHT an in any way. The reason I am trying to access it is because I have had a few weird intermittent problems that I can't put my finger on and would like to be able to rule hardware out.
I also just replaced my HD with a WD 320 gig drive after my original drive failed due to a physical error. I just restored my data, and all seems to be running well after a permissions repair and a disk repair while booted up on my install disk.
The intermittent problems I was talking about are very vague and rare so I is difficult to describe them other that just a hunch that something is still a bit off. One is the display, every once in a while, showing what looks like a massive bar code or UPC code on my screen. This is not like the bands with soft edges that seem to be a well documented issue with the early MBP but transparent lines of alternating width and brightness with hard edges. Again it looks just like a UPC code transposed on my screen. The other items are random freezing of the OS or the mouse and the fact that my keyboard does not respond to any but a few boot commands. Again all the things are either rare and intermittent or do not come up in daily use of my machine. But when taken together, seem to add up to the conclusion there is still some issue present (at least in my mind).
To recap my specific questions relate to not being able to run the Apple Hardware Test and many of the boot commands having no effect. If you can shed light on the other items mentioned, great!
Thank you!

At a guess, I would think this error code has to do with the video artifacts you are experiencing. You might try reseating all the cables to the display. If the position of the screen makes a difference, there may be damage to a cable, particularly where it goes through the hinge.
Apple is the keeper of the error codes. If you have access to an Apple Store, you could probably ask about this.
Don't know about the other intermittent problems. Does an external keyboard work? If so, there's likely a problem with the internal, maybe even again, a cable or connection.
You could also try creating a new use account and see if the keyboard and mouse problems persist. If not, there could be some sort of software corruption in your usual account. Ditto with the freezing.
Good luck!

Apple Hardware Test error 4SNS/1/40000001:ID0R-0.000 on Retina MBP

Getting the above error on my 3-day old retina MBP with 16gb RAM and 768GB flash storage. I had loaded Chrome, Firefox, VMWare Fusion, Office 2011, and all the Apple updates as of 7/3/12.
My issue may be related to similar issues I've seen on these boards, relating to sleep or wakeup causing the intermittent crash. Machine has also crashed (kernel panic) 2 times. Genius Bar employee downplayed the AHT altogether, saying it's a false positive since his more advanced tool reported no errors. They then kept it for a day, to run a "loop test," which also came back with no errors. Then, because apparently it is easier to re-load the OS rather than actually diagnose the issue, they re-loaded my OS clean. (Yay, now I can re-load all my apps, copy 200GB data back on, and THEN we'll see that it is a hardware problem.)
Tomorrow I'll pick it up from Apple and run the AHT again. If it errors out again, I'm not sure what to do...

One note I had neglected to mention is that the bar/band immediately above the keyboard gets very, very hot. Yes, I know that is where the fans are. However, all 12 of the MBP's at the Apple store did not have this extra-hot band, and those are on all day. My little Safari & Mail apps should not cause an overheat situation, on a functioning machine. Apple blamed Google Chrome for the crashes, downplayed the overheating, and downplayed the AHT results.
Update: I went to the Apple store today and took a look at the notebook. They ran their tests, had re-loaded the OS, and performed an undisclosed hardware repair. (They were helpful but vague as to what the actually did on the machine, hardware-wise.) They said their advanced tools & extended Loop Test did not indicate any errors or problems. While still at the store, I ran another quick test with the Apple Hardware Test, which came back with the same 4SNS error as mentioned above. I asked for a refund, which they approved (except they said I have to come back Monday since I bought the machine from Apple Business.)
When I got home, I ran an extended test with the Apple Hardware Test and got a *diffferent* error this time: 4HDD/11/40000000:SATA(0,0).
It's seems strange to me that the AHT shows 2 different errors, and yet the Genius' "advanced " tools find no errors. Thankfully, I will return this one (eventually) get a new unit. Thanks to everyone for helping. --Peter

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.

Files/Folders Sticking to Mouse Pointer - Not Releasing (Reset PRAM & Apple Hardware Test Fail to Run)

I've been having two issues with my Late 2008 MacBook Pro 15-inch - Running OS X 10.8.5 (Mountain Lion). Unable to Reset the PRAM and Run Apple Hardware Test (AHT).
On a random basis - File/Folder icons are Sticking to the Mouse Pointer - Not Releasing. I've done everything from trashing finder preferences, making sure Universal Access preferences are off, Restoring Defaults in the Energy Saver System Preferences, Resetting the System SMC. Another post mentioned that this is being caused by the Graphics Driver not working correctly - and mentioned to put the MBP to sleep, then wake it up, and the files/folders are no longer sticking to the mouse pointer. This works for me and released the sticking items in the Finder.
OK, Good this is a simple fix, BUT, what is really causing this issue, and how may it be fixed or repaired?
I also tried to Reset the PRAM and Run the Apple Hardware test (AHT), and these both fail to run on my MacBook Pro with OS X 10.8.5.
1) Resetting the PRAM:
Shut down the MBP, press the power button, and hold down at the same time <option><command>-P-R. The Reset PRAM process never starts up, but rather I receive the Padlock/Password Login which logs me into the Restore System Utilities. I'm unable to Reset the PRAM.
2) Apple Hardware Test (AHT):
Shut down the MBP, press the power button, and hold down the "D" key, the system boots up as normal and does not enter the AHT.
The File/Folder Finder sticking to the mouse pointer issue is very annoying. Does anyone have a solution to resolve this issue?
- Cheers

HI Barbara,
It sounds like the hard drive is failing or has failed. Boot from your Mac install disc and if you can run Disk Utility in case the startup disk needs repairs.
Insert your install disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu and launch Disk Utility.
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
*(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)*
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
When you are finished with DU, from the Menu Bar, select Utilities/Startup Manager.
Select your start up disk and click Restart
While you have the Disk Utility window open, look at the bottom of the window. Where you see Capacity and Available. *Make sure there is always 10% to 15% free disk space*
If you cannot boot from your install disc, try booting in Safe Mode
What is Safe Mode
Carolyn

Cannot access Apple Hardware Test

I recently learned about the Apple Hardware Test, and decided to run it, just to see if it reported anything wrong.
I have a MBP from early 2008, 2.2 GHz Core 2 Duo, 15.4".
The built-in optical drive no longer reads DVD-type media. It will read CDs, but not DVDs of any kind. This has been verified by an Apple Genius; it needs to be replaced.
I have a Snow Leopard disc in an external drive, connected via USB. When the Mac is running, I see the Snow Leopard disc; I can access normally.
However, when I restart (or turn off, then on) the computer, and press and hold 'D' right away, nothing different happens; it boots into OS X just as it normally does. I have tried this a few times, both restarting and turning off then on, holding down the 'D' key right away.
Is the problem that the OS X disc is in an external drive? If this is the problem, then how is the AHT accessed on a MacBook Air?
Is the problem the Snow Leopard disc itself; does it not have the AHT on it to begin with? I can no longer locate the original 10.5 discs that came with my computer, but I believe I may be able to get ahold of a relative's later-version 10.5 discs.
Or is there some other problem or something else I'm doing wrong?

Hi again Justin,
Justin J. Rebbert wrote:
Well, as I mentioned in my original post, no, I do not have the original Leopard discs that came with my Mac. But as I also mentioned, I can probably get ahold of a set of Leopard discs that belong to a relative. One thing I did not mention, though, is that I'm pretty sure these Leopard OS X discs are retail (did not come with a computer). Do you know for sure whether or not regular Leopard discs have the AHT on them?
Yes, 100% certain. AHT comes only with the original discs that were supplied with your model MBP.
eww has suggested a link for you where they can be purchased for $33. However, with an internal optical drive that cannot read CDs/DVDs, your only options are:
1. Repair/replace the internal optical drive.
2. Purchase an external optical drive.
3. Create a partition in your external drive and then using either Carbon Copy Cloner or the Restore feature within Disk Utility, create a bootable image of the original OS DVD. When you start up from this bootable image it behaves in exactly the same way as if you started up from the OS DVD.
Justin J. Rebbert wrote:
I have no idea what you're talking about when you "like you did with Snow Leopard". I didn't have to make bootable images or use different partitions or anything like that at all, and I don't know what made you think that.
My apologies. In your original post you said:
I have a Snow Leopard disc in an external drive, connected via USB. When the Mac is running, I see the Snow Leopard disc; I can access normally.
The above made me conclude that the "external drive" was an external hard disk drive. Reading it again, I can see that you mean it's an external optical drive.
Now, I know that eww, in his reply to you stated the following:
I don't believe AHT can be run from an external drive. It requires all external devices to be disconnected except the AC adapter.
eww is very knowledgeable and well respected in these forums so I'm hesitant to disagree with him. I believe that one can carry out a AHT from an external optical drive but will test later today or tomorrow to make sure.
Justin J. Rebbert wrote:
Also, just FYI, from what I've read about accessing the AHT in other posts on these discussion forums, apparently all Macs (of a certain unknown vintage and later) have the AHT accessible from the hard drive, but this is only true if it's the original hard drive, which furthermore has never been reformatted. My MBP's hard drive is an upgraded (bigger and faster) replacement, so unfortunately, that's no longer an option.
No, it's not only true if it's the original hard drive.
It is, however, true if the OS on the replacement hard drive was installed using the original disks that came with that model Mac. The OS can the be upgraded to a later version but the fact that the original OS DVDs were used then, assuming the Mac model is of the vintage that allows it, a hidden small partition is created thus allowing the user to boot into AHT without needing the original discs to start from.
Da Vinci

HT4904 Apple Hardware Test or not?

Tried to open Apple Hardware Test on my MBP Pro 13", but pressing the D-key while starting the MBP did not work.
Turned to "Computers that can be upgraded to use Lion Internet Recovery" where the latest MBP 13" is early 2011.*
My MBP 13" is late 2011 (recently upgraded to OSX 10.8.1).
What can I do to use the test?
*Download and install an updated EFI Firmware ROM for these computers to use the OS X Internet Recovery feature:
MacBook Pro (13-inch, Early 2011)

Usermagic wrote:
Ok, I tried it but the disc is damaged and can not be read.
(Strange because the disc have never been used. I called Apple about this and they
said that they do not produce CD/DVDs anymore with AHT.)
Which number did you call?
You can get replacement System Install & Restore CD/DVDs from Apple's Customer Support - in the US, (800) 767-2775 - for a nominal S&H fee. You'll need to have the model and/or serial number of your Mac available.
If you're not in the US, you may need to go through the regional Apple Store that serves your location to find the contact number. Here's a list of links to all of those - http://store.apple.com/Catalog/US/Images/intlstoreroutingpage.html Another resource: International Support Phone #s.

Apple Hardware Test Log?

I'm trying to sell my PowerMac G5, and the buyer wanted me to run Apple Hardware Test and email the log so they know it doesn't have any problems, but I'm not able to find a log anywhere. Is there any way that I'm able to meet this request?
Thanks in advance.

Hi, and a Warm Welcome to Apple Discussions and the Power Mac G5 Forum!
Well - can't say I've heard tell of an AHT log - perhaps the buyer can suggest where exactly this log might be located?
You could try taking a photo of the test output on the display, and emailing that.
The AHT runs in a basic OS from CD/DVD in order to minimise hardware resource usage and maximise test coverage - so the usual handy utilities are not available. The advice is invariably to write down any error messages. Some general AHT info here
http://www.thexlab.com/faqs/aht.html
Good Luck.

Apple Hardware Test-Where?

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