TRUN Posted November 29, 2010 Share Posted November 29, 2010 If I back up my current system on an external HD and then upgrade to SNOW LEOPARD, will I be able to boot back into the LEOPARD OS from the external HD. want to upgrade to SNOW LEOPARD but didn't want to get stuck in case any of my plugs don't work correctly in the SNOW LEOPARD world... Please advise..... Link to comment Share on other sites More sharing options...
Kent Sandvik Posted November 29, 2010 Share Posted November 29, 2010 You need to have a proper OS installation on the disk (or disk partition). When you boot, hold down the option key and you could select what OS you want to boot into. Link to comment Share on other sites More sharing options...
TRUN Posted November 29, 2010 Author Share Posted November 29, 2010 Awesome.. Yes... I have a proper OS on the external hard drive..... thanks much... Link to comment Share on other sites More sharing options...
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