HT206886: How to get macOS Sierra
Learn about How to get macOS Sierra
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Helpful answers
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Nov 18, 2014 10:20 PM in response to freddy49by tjk,Hi freddy,
Any apps you currently have on your iMac should remain there when you install Yosemite over Lion. Remember to backup your current installation before installing Yosemite, and I'd recommend using a clone so you can clone Lion and everything back if Yosemite doesn't work out for you.