Upgrading from Yosemite 10.10.5 to Sierra
is there anything special to upgrade from Yosemite 10.10.5 to Sierra
iMac 21.5″, OS X 10.10
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Nothing too much except make sure the have a Time Machine Backup and possibly a TESTED Clones before venturing the Upgrade. This Link will open and then be sure to Open the Sierra link only in Safari - FF / Chrome will not work