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- The Apple Service Diagnostic application is designed to run both EFI and Mac OS X tests from an external USB hard drive. Apple Service Diagnostic (EFI) runs low-level tests of the hardware directly and does not require Mac OS X, while Apple Service Diagnostic (OS) uses Mac OS X to run tests.
- If the external hard drive doesn't show up in Disk Utility, it's possible that the drive have encountered any hardware issues. Move to method 6 to make sure of that. Method 7: Run Mac diagnostics to detect hardware issues. Apple Service Diagnostic is a set of diagnostic tools used by technicians to find faults.
- Back to your case, I suggest you give Onyx a try to check the status of your HDD’s Smart status. Assuming you don’t hear strange noises in the drive, performing a full Clone to an external drive using Carbon Copy Cloner would provide you with an important piece of information: the computer can read your entire drive, block by block.
- Discover the world of external hard drives for Mac. Compare portable, USB and external hard drive models for office and home and shop online.
After isolating an issue on your Mac to a probable hardware issue, you can use Apple Hardware Test to help determine which hardware component might be causing the issue.
If your Mac was introduced after June 2013, follow the steps for using Apple Diagnostics instead.
How to use Apple Hardware Test
- Disconnect all external devices except keyboard, mouse, display, Ethernet connection (if applicable), and connection to AC power. Apple Hardware Test might display an error message if you don't disconnect all other devices.
- Make sure that your Mac is on a hard, flat, stable, well-ventilated work surface.
- Shut down your Mac.
- Turn on your Mac, then immediately press and hold the D key on your keyboard. Keep holding the D key until you see the Apple Hardware Test icon:
- Select your language and click the right arrow. If you aren't using a mouse, you can use the up and down arrows to select a language, then press the Return key.
- To begin testing, click the Test button, press T, or press Return. Optionally select 'Perform extended testing' before beginning the test. This performs a more thorough test that takes longer to complete.
- When the test is complete, review your test results in the lower-right section of the window.
- To quit Apple Hardware Test, click Restart or Shut Down at the bottom of the window.
Learn more
- Some Mac computers that shipped with OS X Lion v10.7 or later will start up from AHT over the Internet if your startup disk doesn't contain AHT, or if you hold down Option-D at startup. This requires an Internet connection over Ethernet or Wi-Fi.
- If you're using OS X Lion v10.7 or earlier and you can't get AHT to start, see if you have an OS X installation disc named “Applications Install Disc 2.” Insert the disc in your internal optical drive or external Apple SuperDrive before following the steps above. Or, if you're using a MacBook Air (Late 2010), plug the MacBook Air Software Reinstall thumb drive into your USB port instead.
10.7: Restore Apple Hardware Test boot mode | 22 comments | Create New Account
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On the one hand Apple now recommends you simply use the disks that came with your Mac on the other hand Apple says 'discs are dead' and removes optical drives from Macs. How crazy is this?
But great hint :-)
But great hint :-)
Had our esteemed moderator tested this hint, he would have found it doesn't work as described. System/Library/Core Services is only writable by the user when preceded by 'sudo'. Thus, the correct syntax should be
Yeah, you're quite correct! Sorry for the mistake.
Somehow I forgot to add that in when writing the hint (or I was using the root account at the time….)
Anyway, yes, sudo must be used. Toyota camry 1999 owners manual download. (It would be nice if the original hint could be modified. :))
Somehow I forgot to add that in when writing the hint (or I was using the root account at the time….)
Anyway, yes, sudo must be used. Toyota camry 1999 owners manual download. (It would be nice if the original hint could be modified. :))
Fixed it. Thanks for the catch.
-- The esteemed moderator
-- The esteemed moderator
Had out esteemed smarta$$ looked, he'd have seen that Baltutis below posted the correct command.
If you're gonna call someone out, be smarter.
sudo cp -R /Volumes/[your INSTALL DISK name]/System/Library/CoreServices/.diagnostics /System/Library/CoreServices
If you're gonna call someone out, be smarter.
sudo cp -R /Volumes/[your INSTALL DISK name]/System/Library/CoreServices/.diagnostics /System/Library/CoreServices
Download tor for macbook pro. If you use the discs that came with your Mac, you can also simply install the 'CPUHelpFiles.mpkg' metapackage, usually on the Applications Install Disc (part of 'Install Bundled Software': select only 'CPU Help Files' and deselect everything else): this will install AHT and also the documentation files for your machine.
I forgot about the CPUHelpFiles package because other utilities in there (such as the processor pref pane seem to be broken now), but that does work if you would prefer not to use terminal. Adobe illustrator fonts free download.
Well, rather, the 'Processor' preference pane was an optional part of the Developer Tools (up to version 3.x for Snow Leopard), while 'CPUHelpFiles.mpkg' installs only AHT and the machine-specific documentation stuff inside '/Library/Documentation/User Guides And Information': so, it should be quite safe too install, as there are no extra utilities there.
Apple Service Diagnostic Dmg External Hdd Software
Of course, *to* install (not 'too').
I'm pretty sure this doesn't work if your boot volume is encrypted. You'd need to create a separate unencrypted boot disk/partition, boot to that, install AHT, then boot into AHT.
On encrypted systems, there is a small booter partition which contains the EFI application that asks for your password, loads the kernel from the booter partition and once the kernel found and unlocked your encrypted volume, system startup continues as usual.
If your system has the recovery system (and most Lion installs should have), it and the booter share a partition after your root volume. diskutil list will confirm there is this hidden partition called 'Recovery HD'. If your system for some reason does not have the recovery system, but you encrypted the root volume, the partition will be named 'Boot OS X'.
Either way, just mount this hidden partition ('diskutil mount Recovery HD' or 'diskutil mount Boot OS X') and then copy the .diagnostics folder to /Volumes/{Recovery HD|Boot OS X}/System/Library/CoreServices.
After that, you can boot to AHT by holding D, like on unencrypted systems.
It is probably a good idea to copy AHT to the Recovery HD, regardless of the encryption status of your root volume, but I haven't tested if the firmware finds AHT there when the partition is not the first HFS+ volume on your primary disk.
Curiously, one can boot the recovery system, but not AHT, when the firmware password is set.
If your system has the recovery system (and most Lion installs should have), it and the booter share a partition after your root volume. diskutil list will confirm there is this hidden partition called 'Recovery HD'. If your system for some reason does not have the recovery system, but you encrypted the root volume, the partition will be named 'Boot OS X'.
Either way, just mount this hidden partition ('diskutil mount Recovery HD' or 'diskutil mount Boot OS X') and then copy the .diagnostics folder to /Volumes/{Recovery HD|Boot OS X}/System/Library/CoreServices.
After that, you can boot to AHT by holding D, like on unencrypted systems.
It is probably a good idea to copy AHT to the Recovery HD, regardless of the encryption status of your root volume, but I haven't tested if the firmware finds AHT there when the partition is not the first HFS+ volume on your primary disk.
Curiously, one can boot the recovery system, but not AHT, when the firmware password is set.
I just tried doing this, but there isn't enough space on the recovery volume to copy all of the files in the .diagnostics folder. : (
Maybe I'm wrong, but the command should be:
sudo cp -R /Volumes/[your INSTALL disc's name]/System/Library/CoreServices/.diagnostics /System/Library/CoreServices/
sudo cp -R /Volumes/[your INSTALL disc's name]/System/Library/CoreServices/.diagnostics /System/Library/CoreServices/
Apple Service Diagnostic Dmg External Hdd Drive
How to get rid of advanced mac cleaner virus. You are correct, BT! Slight difference, but then that's what makes things work or not!
SB
SB
FYI, I couldn't get 'D' to work on a 2011 MacBook Air. My drive is encrypted and I had a firmware password turned on. Once I disabled the firmware password, 'D' worked. That's a bit unfortunate, as what if my drive has died? How can I reach the recovery partition to disable the firmware password to get to the hardware test.
Apple Service Diagnostic Dmg External Hdd Mac
great hint but AHT is pretty worthless and no longer really used. If you want to run diags on your computer that will actually do something, use apple service diagnostics (ASD) for your model instead
I could not find my original disks, but was able to restore the .diagnostics folder from a pre Lion upgrade time machine backup. Had to show hidden files first, but then just went back far enough and restored that one folder. Boot while holding D worked fine.
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HELP! Can't do ANY diagnosing on Late-2011 MBP w/ 16GB RAM! :-(((
Alright, I still don't understand how to find either the 'Holding the D' function and/or some other utility (3rd party or Apple) for those of us who have a (Late-2011) MacBook Pro!? No disks, just a useless SuperDrive and no USB stick either. I did make myself my own USB restore flash drive, however, and I also have the Recovery HD partition unhidden, mounted, but I just cannot seem to locate this '.diagnostics'.folder(is it?) or is it a pkg or a file? :-( System files are also visible, so I did some manual searching for the elusive diagnostic 'something-or-other'. No dice across the board. :(
I would really like to check my 2x8GB RAM chips, which, thus far, work perfectly fine and show up correctly everywhere they should, including System Info/Profiler, 'About this Mac', iStat Menus, Activity Monitor, and a few others. I just want to make sure, as I had not heard of that memory company before and the price was incredible ($139 shipped, no tax for BOTH from a seller on Amazon).
Thanks for helping! ;-)
I would really like to check my 2x8GB RAM chips, which, thus far, work perfectly fine and show up correctly everywhere they should, including System Info/Profiler, 'About this Mac', iStat Menus, Activity Monitor, and a few others. I just want to make sure, as I had not heard of that memory company before and the price was incredible ($139 shipped, no tax for BOTH from a seller on Amazon).
Thanks for helping! ;-)
I've got MacBook Pro (15-inch, Late 2011) with Apple Hardware Test originally accessed by holding D at startup.
However after restoring Mac OS X Lion by the Internet using Lion Recovery D-key stopped working. I've followed the tip and copied .diagnostics folder:
ls -al /Volumes/Macintosh HD/System/Library/CoreServices/.diagnostics/
total 48
drwxr-xr-x 3 root wheel 102 Feb 13 16:06 .
drwxr-xr-x 125 root wheel 4250 Feb 13 16:06 .
-rwxr-xr-x 1 root wheel 22590 Feb 13 16:06 diags.efi
and
ls -al /Volumes/Recovery HD/System/Library/CoreServices/.diagnostics/
total 48
drwxr-xr-x 3 User staff 102 Jun 27 2011 .
drwxr-xr-x 4 User staff 136 Jun 27 2011 .
-rwxr-xr-x 1 User staff 22590 Jun 27 2011 diags.efi
However the D-key still doesn't call AHT as expected.
What else should I try?
However after restoring Mac OS X Lion by the Internet using Lion Recovery D-key stopped working. I've followed the tip and copied .diagnostics folder:
ls -al /Volumes/Macintosh HD/System/Library/CoreServices/.diagnostics/
total 48
drwxr-xr-x 3 root wheel 102 Feb 13 16:06 .
drwxr-xr-x 125 root wheel 4250 Feb 13 16:06 .
-rwxr-xr-x 1 root wheel 22590 Feb 13 16:06 diags.efi
and
ls -al /Volumes/Recovery HD/System/Library/CoreServices/.diagnostics/
total 48
drwxr-xr-x 3 User staff 102 Jun 27 2011 .
drwxr-xr-x 4 User staff 136 Jun 27 2011 .
-rwxr-xr-x 1 User staff 22590 Jun 27 2011 diags.efi
However the D-key still doesn't call AHT as expected.
What else should I try?
Apple Service Diagnostic Dmg External Hdd Windows 7
Hi, did you ever manage to get anywhere with this? https://premiumgenerous710.weebly.com/microsoft-office-for-mac-sierra-free-download.html. Mac address lookup app.
I confirm that this method still works with 10.8.5 installed on a Feb 2011 macbook pro.
On newer Macs (which shipped with Mavericks), Apple Diagnostics initially is on the Recovery HD; so, after mounting it with:
$ diskutil mount Recovery HD
. Apple Diagnostics is in the folder:
/Volumes/Recovery HD/com.apple.recovery.boot/.diagnostics
So, the best thing to do would be to make a copy of this invisible folder (personally, I zipped it and stored it on an external hard drive), in order to be able to restore it if you reinstall OS X (which also updates the recovery partition, removing the '.diagnostics' folder); when restoring it, also remember to restore the original permissions for the '.diagnostics' folder and its contents: i.e., essentially, root read-write, wheel read-only and everyone read-only.
Sadly, presently there seems to be no way to re-download Apple Diagnostics from Apple and reinstall it: so, if you didn't make the backup copy from your initial, out-of-the-box setup, the only option remaining is the Internet-based one, as also explained here:
http://support.apple.com/kb/HT5781
(Probably, the situation is similar also for Macs which shipped with Lion and Mountain Lion (with AHT).)
$ diskutil mount Recovery HD
. Apple Diagnostics is in the folder:
/Volumes/Recovery HD/com.apple.recovery.boot/.diagnostics
So, the best thing to do would be to make a copy of this invisible folder (personally, I zipped it and stored it on an external hard drive), in order to be able to restore it if you reinstall OS X (which also updates the recovery partition, removing the '.diagnostics' folder); when restoring it, also remember to restore the original permissions for the '.diagnostics' folder and its contents: i.e., essentially, root read-write, wheel read-only and everyone read-only.
Sadly, presently there seems to be no way to re-download Apple Diagnostics from Apple and reinstall it: so, if you didn't make the backup copy from your initial, out-of-the-box setup, the only option remaining is the Internet-based one, as also explained here:
http://support.apple.com/kb/HT5781
(Probably, the situation is similar also for Macs which shipped with Lion and Mountain Lion (with AHT).)