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Use hardware test mode directly on latest MacBook pro
Authored by: mjs13 on Jun 18, '08 03:43:06AM
This working because Apple Hardware Test (AHT) is on some modern macs installed in the 200 MB EFI partition. If you reformat your disk the EFI partition is wiped, and it will not work anymore.

I have seen it working on all Aluminium iMac's and MacBook Air (which is the only one where Apple refers to this behaviour in the documentation) I expect it to be working on most newer models since the Alu iMac.

If you want to see the EFI partition, run diskutil list in the terminal

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