Accessing Apple Hardware Tool on MacBook Air 2010 running Yosemite I charged my MacBook Air (Late 2010) up to 100% charge overnight however my battery died within 1 hour. Because of this I want to use the Apple Hardware Tool (AHT) to diagnose the issue.

My Mac is 4 years old and holds up to 70%-75% of its original capacity (6,700mAh).

I have tried holding the D key when booting my computer however it boots up normally.

How would I accesses the AHT?
Your AHT feature will have been lost when you upgraded to Yosemite.

You can restore it by inserting the Applications Install disc that was supplied with your computer and typing the following command, putting in the actual name of the disc where indicated...

sudo cp -R /Volumes/[name of disc]/System/Library/CoreServices/.diagnostics /System/Library/CoreServices


You will of course be able to run the diagnostics directly from the install disc.


Actually read the question properly and of course your Air doesn't have an optical drive - did it come with any re-installation media? If not you now know where the actual test file should go, if anyone can supply you with the required file