(My initial post on my failing hard drive--now confirmed--is sort of in the way where I hope to go in terms of remedy, hence this post): My 2007 24 iMac recently suffered an internal hard drive failure, confirmed by DiskWarrior. Everything else on the iMac seems to be functioning (graphics card, logic board). Rather than install a new internal hard drive (which could be subject to heat stresses and fail) another optioned mentioned was getting an external hard drive as my drive/boot source (ignoring the internal failed hard drive completely) connected to the iMac via a SATA USD docking station. If thats a doable option Im all in favor of it. Im wondering if someone could walk me through the steps--Do I just buy the dock and new external hard drive, connect them together, plug it into the iMac and boot it using the option key so I can pick the new external drive? Or will the new drive need to be formatted first? (and how would I do that without a functioning Mac?). Im assuming if the iMac recognizes the new drive Ill be able to install the OS onto it, make it the boot disk, and have it run as before. Is that pretty much it?