First. Has anyone who installed Yosemite booted to recovery (Command+R) to see if it updated recovery to yosemite recovery? Second and most important. Has anyone tried internet recovery (Command+Option+R). Internet recovery should default to installing the OS that shipped with the computer. So if my mac shipped with Mavericks and I installed Yosemite and wanted to erase the HD and go back. I should be able to with internet recovery. Just want to know if anyone has tested before I install Yosemite.