![]() ![]() But what has me concerned is the line in that HT201372 doc (under Learn more near the end) which states: I haven't tried this as yet because my main concern is if I don't want to use the result how can I revert back to my 10.6.8? As I said I would do this to a copy of my 10.6.8 drive and ideally if I wanted revert I simply boot from the original 10.6.8. ![]() Then I can use that installer to upgrade (a copy of) my 10.6.8 to 10.11. According to Apple's "How to create a bootable installer for macOS" (HT201372) I can download the El Capitan package installer to install "Install OS X El Capitan.app" into 10.6.8's /Applications, and then use its createinstallmedia tool to create a bootable 10.11 installer on to a flash drive. I want to upgrade my mid 2010 Mac Pro's 10.6.8 Snow Leopard to, say, 10.11 El Capitan (please don't ask why I haven't ever done this till now). ![]()
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