Either way, setting up a bootable Install USB drive (8 gig minimum for Yosemite) was necessary. When encrypted (Time Machine and CCC clone of drive), the Recovery HD is not setup (not sure details, perhaps this is how encryption works). The angle on the install was that my Time Machine and Old HD were encrypted. MBP late 2011 replaced HD with SSD (Samsung 850 EVO). Thought that I would add this comment in case someone has similar situation. Use Migration Assistant to transfer apps and data from your old HD to your new HD in the iMAC.

You may need to use Disk Utility to format or erase your new HD if it doesn't show up. Now go to the App Store and Download and install Mavericks. It's just like booting when the drive was still in the iMac but maybe a little slower.Ĥ. When it boots, it should recognize your old HD in the enclosure and give you the option to boot from that drive. Hold down the option key on your keyboard and turn on your iMac. Plug in the enclosure and its USB or firewire cable to your iMac.ģ. Use the iFixit HD Replacement Guide to put your new HD into your iMac and put your old HD into the enclosure.Ģ. Didn't tell me why, it just told me it couldn't do it. When using a Recovery disk to install Mavericks, OS X just told me it couldn't install Mavericks.

This Mac OS X Install Guide is really outdated.

How to install mac os on pc with disc