aht osx 10.9.5 on iMac mid 2010
how to use aht on iMac mid 2010 running osx 10.9.5
iMac, OS X Mavericks (10.9.5), mid 2010 27"
A mid 2010 came with install disks (Snow Leopard) - you will need disk #2 to run the AHT as it does not have the built in capability found in the later digital-download-only OS versions.