Apple Diagnostics is in the folder: VolumesRecovery HDcom.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.Apple now recommends you simply use the disks that came with your Mac.For this to work your Mac model will need to be older than that install disk, thats when it was introduced, not when you bought it.If its an original Snow Leopard disk, thats older than Oct 2009, or if its a more recent one, older than 10.6.3.
If youre not sure if a disk will work for you, try the hint anyway, it wont harm your computer. And thats it Once the directory copies over, youll just need to hold down the D key to startup your Mac. Its possible that some future Lion update will either break this hint, or more hopefully, restore the capability and render it obsolete. SystemLibraryCore Services is only writable by the user when preceded by sudo. 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. It would be nice if the original hint could be modified.:)). If your system has the recovery system (and most Lion installs should have), it and the booter share a partition after your root volume. 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 VolumesRecovery HDBoot OS XSystemLibraryCoreServices. 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 havent tested if the firmware finds AHT there when the partition is not the first HFS volume on your primary disk. Aplle Ha5Rdware Test For Lion Osx Password Is SetCuriously, one can boot the recovery system, but not AHT, when the firmware password is set. My drive is encrypted and I had a firmware password turned on. Thats 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. If you want to run diags on your computer that will actually do something, use apple service diagnostics (ASD) for your model instead. Had to show hidden files first, but then just went back far enough and restored that one folder. Aplle Ha5Rdware Test For Lion Osx Manual Searching ForI 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 InfoProfiler, 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). Aplle Ha5Rdware Test For Lion Osx Mac OS X LionHowever after restoring Mac OS X Lion by the Internet using Lion Recovery D-key stopped working. Ive followed the tip and copied.diagnostics folder: ls -al VolumesMacintosh HDSystemLibraryCoreServices.diagnostics total 48 drwxr-xr-x 3 root wheel 102 Feb 13 16:06.
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