One is Apple MacBook Pro Retina 13.3' (MF839ZA/A). Download macOS Sierra Step 1: Check your. Here's what you need to know! MacOS Sierra is here! Are you ready to upgrade? Apple has made it easier than ever to update to the latest operating system, even if you are running an older OS X operating system on your Mac. Even if you are still running Mavericks, you can upgrade to macOS Sierra.
Before you leap from Yosemite, check the specific printer/scanner vendor driver sites to verify if either have High Sierra driver support. The only full upgradeinstallers are in the Mac App Store, and here is the link to How to upgrade to macOS High Sierra. Any ideas where I can find it? Thanks in advance. I just typed 'Sierra' into the App store, and can't find it. I thought it was about time I finally upgraded my Mac laptop from the outdated Yosemite OS, to Sierra. If you are running Lion (version 10.7.5), Mountain. If you have macOS Sierra (the current macOS version), you can upgrade straight to High Sierra without doing any other software installations.
