My brother's OSX-running PC has recently failed him. Completely. So, while he is saving for a mini, I was thinking I could share my iMac with him. I am pretty protective of my computer and its contents, so I was thinking if he could get an external harddrive that he could load OSX and all his stuff onto, plug that into my iMac, and then be able to boot off of it (it would be especially helpful if a Boot Camp-style selection were possible.) He could get his website and various files in order, and then when he gets a mini, he could simply plug his external harddrive into it and transfer files over. Is this possible? I've used Macs for about a year and a half, but I have never needed to do anything like this. Thanks. EDIT: I did search for threads, "osx external hdd," "osx external hard drive," "osx partition external hdd," "osx partition external harddrive," and "osx partition external hard drive," and couldn't find anything relevant. Sorry.