Apple hardware test (AHT) preinstalled on latest macs

hello,
it seems that apple ships it's latest mac models, with AHT preinstalled - i.e. if you hold down the 'D' key on startup a new mac boots into AHT even without any CD present.
according to another thread (which i unfortunately lost the link to) it is installed in the following hidden direcotry:
/System/Library/CoreServices/.diagnostics
which contains a whole lot of things.
this is obviously very handy to have, however if you have to do a fresh install this directory does not get recreated, thus we are wondering about the following:
• with which models has apple started to do this;
• does the .diagnostics directory contain model specific information;
• how can we recreate this directory once lost, due to OS reinstallation;
any help appreciated.
ds.

thanks for your reply - that is exactly what i had hoped for.
now to the intriguing part, as described in your reference there is whole bunch of subfolders with seemingly similar content in /.diagnostics
after closer inspection, here is what i found...
.diagnostics AHT Version Model Identifier
? 3A130 ? MacPro3,1
? 3A131 ? MacBookAir1,1
? 3A135 ? MacBookPro4,1
Mac-F42D89C8 3A147 3.3.1 MacBook5,1
Mac-F42D86C8 3A148 3.3.2 MacBookPro5,2
Mac-F22C86C8 3A150 3.3.1 MacMini3,1
Mac-F42D88C8 3A151 3.3.1 MacBookAir2,1
? 3A153 ? MacPro4,1
Mac-F2218EC8 3A156 3.3.1 iMac9,1
Mac-F2218FC8 3A157 3.3.1 iMac9,1
? 3A158 ? MacBookPro5,1
? 3A160 ? MacBookPro5,2
Mac-F22788AA 3A161 3.3.1 MacBook5,2
Mac-F42D89A9 3A162 3.3.1 ?
Mac-F42D86A9 3A163 3.3.1 MacBookPro5,1
? 3A165 MacBook5,2
Mac-F22587C8 3A171 3.3.1 MacBookPro6,2 MacBookPro5,3
Mac-F22587A1 3A172 3.3.1 MacBookPro5,4
Mac-F2268AC8 3A173 3.3.1 MacBookPro5,5
Mac-F2268EC8 3A175 3.3.1 MacBookPro6,1
? 3A176 ? iMac10,1
Mac-F2268DAE 3A178 3.3.2 ?
Mac-F22C8AC8 3A181 3.3.2 MacBook6,1
Mac-F2268DC8 3A188 3.3.1 ?
Mac-F2268CC8 3A189 3.3.1 ?
? 3A195 ? iMac11,2
? 3A199 ? MacBook7,1
? 3A202 ? iMac10,1 iMac11,1 iMac11,3
? 3A207 ? MacPro5,1
the above is collated with information from mactracker - strangely enough my imac i7 (late 2009, iMac11,1) does not seem to preinstalled with the AHT version it requires... although it works just fine!
anyway will try to reinstate from install disk later today and report back.
ds.

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COOL FEATURE - Apple Hardware Test (AHT) built-in. No disc needed!

It's a MacBook Late 2007... it would be interesting to see what other models have this feature.
Start the Mac
hold the D key
do NOT put in your installer disc
it starts up Apple Hardware Test (AHT) in like 5 seconds. No disc needed. VERY COOL
(unfortunately, it seems to have been disabled after I did the Keyboard Firmware Update)

Some G5s had a firmware update that caused problems with the version of Apple Hardware Test that shipped with the G5. The Latest G5 Apple Hardware Test is 2.2.5
Call Apple and see if you can get it.
Another hardware test is TechTool Pro
<http://www.micromat.com/index.php?option=com_content&task=view&id=31&Itemid=48>
Meanwhile, try testing with some of the RAM removed. Try different combinations of RAM modules and slots. Always use them in pairs.

Apple Hardware Test AHT

Hi,
I would like to run the Apple Hardware Test (AHT) on my MacPro(2,1) and since I have upgraded from Panther through Leopard to Snow Leopard, I have misplaced the original installation disks that came with my Mac Pro. Is there anyway to run AHT without those original install disks? Is there somewhere to download the images that I need?
TIA .... Jon

You will have to call AppleCare and arrange to purchase replacements. There are no alternative sources for the AHT for your Mac Pro.

Apple Hardware Test (AHT), buzzing noise, fan blows loud, & AHT crashes

Hi there,
I've finally had it with some hardware issues that I've had since day 1 of owning this G5 Dual 1.8.
Running10.4.9 OSX...
Nothing that has affected my day to day working-yet, but growing problems, fans get loud, awful buzzing noise from inside the tower comes and goes and grows in volume when it's happening. I believe it's coming from the internal drive bays... Both of which are filled with 2 new SATA Seagate internals that don't appear to be slowing up or spinning a processing error when I'm working...
When I run an Apple Hardware Test, The AHT disc crashes each time at the 5 minute and :12 second mark while "In Progress" on the "Mass Storage" test, it freezes and the fan gets loud. I do a hard restart to get up and running ok each time afterwards.
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AHT Version 2.2.2
Disc Version: 1.1
I've scoured Apple knowledge base for anything on this version-but nothing.
Any suggestions please. IS there any hardware testing software out there besides the faulty AHT disc software Apple provides? The nearest Apple store is over an hour and half away, I just don't have time to drive there to hear the same thing I already know, and if I could pinpoint the problem myself with proper software, I can handle doing the maintenance....
Please help!
Thanks!
DAve

Some G5s had a firmware update that caused problems with the version of Apple Hardware Test that shipped with the G5. The Latest G5 Apple Hardware Test is 2.2.5
Call Apple and see if you can get it.
Another hardware test is TechTool Pro
<http://www.micromat.com/index.php?option=com_content&task=view&id=31&Itemid=48>
Meanwhile, try testing with some of the RAM removed. Try different combinations of RAM modules and slots. Always use them in pairs.

Yet another pointless question about the practically non-existent iMac G5 Apple Hardware Test (AHT) disk.

I have a 17" iMac G5 (iSight model) also known as model A1144, PowerMac12,1 or MA063LL/A.
Where do I download the Apple Hardware Test (AHT) disk for this machine? Apparently nowhere. However, it would really help me on my quest if I knew what I was looking for.
Does anyone know what AHT version is compatable with my machine? 2.2.1? 2.3.1?
How about the part number on the disk? I have some Intel disks that say 2Z691-5734-A that (obviously) won't work.
Is the AHT on Disk 1 or Disk 2? I'm starting to think there never was an AHT for this model.
Where do I get those ASD disks the so called "geniuses" have?

Disk 1: 2Z691-53179-A
Disk 2: 2Z691-5493-A
Compatible with eMac (2005), iBook G4 (Late 2004), iBook G4 (Mid 2005), iMac G5 17-inch (ALS), iMac G5 20-inch (ALS), iMac G5 (17-inch iSight), iMac G5 (20-inch iSight), iMac (Early 2006 17-inch), iMac (Early 2006 20-inch), Mac mini, Mac mini (Late 2005), Mac mini (Early 2006), MacBook Pro, Power Mac G5 (Early 2005), Power Mac G5 (Late 2005), PowerBook G4 (15-inch Double-Layer SD), PowerBook G4 (17-inch Double-Layer SD)
http://www.welovemacs.com/2z69153179a.html
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Thanks Kappy, if v2.2.1 then search for...
018-1680-A.dmg

Apple Hardware Test (AHT) is GONE!! after Lion install

After installing Lion on my new early 2011 MBP the AHT is gone...
Pressing "D" will not load the AHT (it was installed and working fine in my MBP prior to Lion).
I called the APP hotline to inquire about it and the technician couldn't boot into the AHT on all the macs with Lion available to him.
(a report has been filed with the engineering team)
According to the newly updated KB: http://support.apple.com/kb/ht1509
QUOTE: "Some Macintosh computers that shipped with OS X Lion support the use of Apple Hardware Test over the Internet."
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>> Is anybody else having this problem?? <<
If you are having the same problem maybe you should also report it to Apple: http://www.apple.com/feedback/ or the APP hotline...

HOW TO FIX THE AHT PROBLEM IN LION:
Just to clarify what Francisco was saying in Spanish:
> The original AHT that came preinstalled in the MacBook Pro (and maybe all other Macs) is found in disk #2.
> Originally I thought the AHT had a different partition on the HD but it ends up being an extension of the OS.
> This is not installed in OS X Lion, If you used the USB key or download it from the App Store, the AHT will not be included.
> So, to install it back in, you can either run the install from the DVD (just make sure you don't install iLife again and other files which you may not need)
OR
For Road Warriors
Since installing the bundled package will also install other Snow Leopard files; You might want to try this:
> Download Pacifist ( http://www.charlessoft.com/ )
> Drill down the CPUHelpFiles install package and only install the CPU_AHT package.
By the way, there is no way of undoing this, unless you want to reinstall Lion from the recovery partition.
> Restart your mac
> Everything should be A+ ok
> To test what you just installed restart the mac and hold down the "D" key before the screen turns white/gray. After a few seconds you should see the AHT loading screen:
Done! there is no need to have that DVD with you when you travel...

Apple Hardware Test (AHT) Hard Drive Full Read Fail But SMART Status OK

I have a Mac mini Server from Mid 2010 running Snow Leopard Server.
Ocassionally, it'll freeze up with the spinning beachball wheel for a few minutes. This usually happens when opening an app or performing an app function from the menu bar. It's a pretty clean system—there are not many apps installed.
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S.M.A.R.T isn't perfect. Neither is AHT for that matter, but if it is reporting that reading is taking longer than it should then an impending failure is likely. The occasional "wait cursor" appearance supports that diagnosis.
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Apple Hardware Test (AHT) invoked at startup with 'ALT-D' not 'D'

Although several reasonnaably reliable sources (including such page as http://support.apple.com/kb/HT1533 ) mention that pressing 'D' at startup will invoke the Apple Hardware Test startup option, at leats on my Macbook Pro 2011 with OSX Lion, EFI 2.8 it is really 'ALT-D' that invokes AHT not 'D'. Pressing the 'D' at startup simply seems to hangs bootup until I release the key.

OS X Lion- About OS X Recovery
OS X (Lion/Mountain Lion)- About OS X Recovery
Computers that can be upgraded to use Lion Internet Recovery
The above documents what keyboard shortcuts are used to invoke AHT and some added functions in Lion and/or Mountain Lion.

What version on Apple Hardware Test (AHT) does my iMac support?

When I start up my iMac holding the "D" key, it gives me this message: "Apple Service Diagnostic does not support this machine (iMac8,1/Mac-F226BEC8)"
I'm guessing the shop I took it to last year who reinstalled Snow Leopard used the wrong disc or something??? Anyhow, I need to find the disk with my correct version of ASD. My iMac is an A1224 EMC 2133. Thank you.

Look here:
http://support.apple.com/kb/TS4154
EDIT:
Ooops! That refers to Lion!
The hardware test for Snow Leopard is on Disk 2 of your original install disks.
http://support.apple.com/kb/HT1509
Message was edited by: Klaus1

Run the Apple Hardware Test (AHT) from a external drive possible?

Hi my DVD drive is dead and i need to do a hardware test now but my macbook pro spits the dvds out., does anyone have experience with running AHT from external drive ?

macjack wrote:
What are you using AHT for specifically? Could you instead use a utility like Rember for checking RAM, which does a better job IMO than AHT?
-mj
i got it back from a authorized apple center that replaced the logic board and video card but now my dvd drive does not work and i can not test it with the original dvds, it was a recall on apples part for a faulty video card.
i want to test the v card as well as anything else i can do to see if someone snatched the original dvd drive becuase this thing was working before i took it there

Error when booting from Apple Hardware Test (AHT) CD

Just downloaded AHT 1.2.6 from here for my 2nd-hand Power Mac.
Burned it to CD with Disk Utility on my iBook, booted from it on the Power Mac, and received the following message after the "loading..." splash screen:
invalid memory access at %SRR0: 00034870 %SRR1: 00003030
This left me at a command prompt, from which I chose to shut down the Mac.
My Mac version is PowerMac3,6 4.4.7f1. Is this error down to using an incorrect AHT CD, or something fundamentally wrong with my RAM? I did test my RAM after purchase with Rember and possibly also with Tech Tool Pro 4.5.3 - no errors reported then.
SiR G.
EDIT: The Power Mac now has its original graphics card installed, not the ATI Radeon 9800 Pro; however, it still has the Sonnet card in place as the boot disk runs from this.
Message was edited by: SiRGadaBout

Hi,
You have the same problem as I, but I also noticed your firmware is a little off. The absolute last firmware update should have given you: "4.4.8f2". Here, have a look at mine.
Machine Name: Power Mac G4
Machine Model: PowerMac3,6
CPU Type: PowerPC G4 (3.3)
Number Of CPUs: 2
CPU Speed: 1.25 GHz
L2 Cache (per CPU): 256 KB
L3 Cache (per CPU): 2 MB
Memory: 2 GB
Bus Speed: 167 MHz
Boot ROM Version: 4.4.8f2
Yeah, I get the same problem as well with the AHT CD, strange as it seems. I tried removing DDR chips one at a time to find the culprit. It seems that I have been unable to figure out why it goes to the open firmware command line and prints: invalid memory access at %SRR0:00034870 %SRR1: 00003030. I ran memtestosx with applejack and although it took hours for it to complete, it gave me fantastic reports of all my memory functioning normally. I do notice the following with my memory:
Size: 512 MB
Type: DDR SDRAM
Speed: PC2600U-25330
Status: OK
DIMM1/J22:
Size: 512 MB
Type: DDR SDRAM
Speed: PC2600U-30330
Status: OK
DIMM2/J23:
Size: 512 MB
Type: DDR SDRAM
Speed: PC2600U-30330
Status: OK
DIMM3/J20:
Size: 512 MB
Type: DDR SDRAM
Speed: PC2600U-30330
Status: OK
**NOTICE that one of my memory sticks is PC2600U-25330, and the rest are PC2600U-30330. Could it be that one of my memory sticks in PC3200 memory and all the rest are PC2700? Help!

How long should the Apple Hardware Test (AHT) run?

II'm running the AHT on a 2012 quad core i5 iMac 16gb/3TB .....the progress bar moved quickly to about 7/8 done, about 4 minutes, but now has been sitting there for 40 minutes.
can anyone provide experience or input as to how long I should expect it to sit there?
thanks

If you run AHT in extended mode it can take over an hour to run, one factor is the HD capacity.

AHT Apple Hardware Test Download & Flash Drive

Hi guys,
I really need to test the hardware on a 13" MBP. Full spec below.
The machine has Yosemite installed & I don't have the original install disc.
Does anyone know where to download the Apple Hardware Test (AHT) files & how to go about using it with a flash drive and a restart?
I've read this can be done but have only found dead links on old websites.
Holding down 'D' or 'Alt+D' isn't working, which I believe is due to the new operating system not having AHT.
Thanks!
Macbook Pro Spec:
MacBook Pro "Core i7" 2.7 13" Early 2011

"Wanted to download this as I'm not sure I can put my hands on the original 10.3 install disc. "
You will need to find it as the AHT is on the *machine specific* System Install DVD 1. If you lost your System DVDs, 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.
!http://i45.tinypic.com/jl0z95.jpg!

Apple Hardware Test problems

Hi All. I have a very weird problem here, as I can't get the Apple Hardware Test to start on my late 2008, 2.66 MBP15 inch model# MC026LL/A (released early 2009 as a quiet upgrade from 2.53). Here's the story:
I opened up my machine as usual one morning, and the optical drive made a very weird noise I never heard before. So I decided to run the Apple Hardware Test (AHT) to see if anything was amiss. Well, I inserted the second install disk, held down the "d" key, and restarted the machine. It began to boot into the hardware test, but just after the AHT screen appears the computer just shut down. This happens every time I try to run the AHT.
I went to an Apple Store while I was on holiday in Brisbane (they don't have one here in Adelaide), and the genius said it was likely a bad optical drive. Well, I returned to Adelaide last week and had the local Apple Authorized store replace the optical drive. Tried to run AHT once again, and the same problem persists. So the original problem wasn't with the optical drive.
I thought maybe I accidentally used the startup disks for my wife's late 2008 15inch, 2.4, MBP (the one actually released in late 2008). I've looked around for the other sets of disks and can't find them. So here's what I'm asking help for: can someone who owns a 15inch MBP 2.66 15-inch (released in early 2009, model# MC026LL/A ) please tell me what the part # is for their set of install disks? It is written on the plastic sleeves of the install disks. And, could this person please tell which version of AHT is written on the disk itself? The set I have (which I think might be my wife's) has AHT version 3A158.
Might this be the problem, or should my computer still be able to run the hardware test using my wife's disks? I know they are both technically late-2008 15inch unibody MBPs, but I think my 2.66 (again, quietly updated and released in early 2009) might require a different AHT version, which would explain my inability to run the test. If not, what might be causing my computer to not run the AHT? I tried reinstalling OS X to no avail.
Thanks for all of your help!

I think I share your skepticism--if your Mac was shipped with the later version of the OS, you should not have been able to do a clean install with discs of an earlier version. It looks like some machines originally shipped with OS X v. 10.5.5 and others with OS X v. 10.5.6. I don't remember just when 10.5.6 came out.
Your two machines are likely very similar in build, and maybe similar enough for the OS to install. It may be that the AHT is specifically designed for the hardware in each machine, and that would be a bit different.
As someone else said in another thread, there ought to be a tutorial on how to keep track of the original install discs since they are always getting lost. Maybe a secure note in the keychain or something like that.
Out of curiosity, does the AHT work on your wife's machine? If not, there could be a problem with the install disc itself, and if so, you might be able to get a free replacement under warranty.
Good luck!

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

Apple hardware test (AHT) preinstalled on latest macs

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