Snow Leopard may be possible to install, but not with a retail SL disc and certainly not with the grey discs from another Mac. You'd need to call AppleCare or customer services and obtain the discs that would have been included if it had shipped with SL.

While it hasn't gotten as much attention as, Apple's big 10.12 update to their Mac operating system is finally out for all to enjoy—and you can download it for free from the Mac App Store right now. Don't Miss: Siri is definitely the in, which than its iOS equivalent. Another great one is the ability to. You can also use Apple Pay in Safari, unlock your Mac with your Apple Watch, keep all your Mac's desktops and documents in sync, and use all the cool new iMessage features that iOS 10 already sports, among other things. If you have multiple computers that need the macOS Sierra upgrade, you'll want to create a bootable install flash drive. The download for macOS Sierra is about 5 GB, and could take some time downloading on each computer individually. So downloading it once and making a bootable USB stick is an easier, faster way to go.

Get microsoft publisher free for mac. Step 1: Download the macOS 10.12 Installer —but don't install it when it finishes downloading. If you do, it will auto-erase the file when your system gets back up and running, which means you won't have the file for your USB drive. So, close out of the installation screen that pops up, if any. Step 6: Install macOS Sierra on Your Computer Now that you're all set, it's time to install Sierra on your computer. Most devices are supported, but just in case, check out the basic list of Macs you can install Sierra on below (for features requirements, ). Also, you'll need OS X 10.75 or later, 2 GB of memory, and at least 8.8 GB of available storage to upgrade your computer. • MacBook (Late 2009 or newer) • MacBook Pro (Mid 2010 or newer) • MacBook Air (Late 2010 or newer) • Mac mini (Mid 2010 or newer) • iMac (Late 2009 or newer) • Mac Pro (Mid 2010 or newer) Since this is the first version of the public release of macOS Sierra, you might want to with Mac OS X El Capitan.

That way, you can play around with Sierra and easily switch back to El Capitan if you end up not liking the new operating system. With your bootable USB drive inserted in your computer, restart your Mac, then hold the Option (alt) key down on your keyboard until the Startup Manager appears. Select the macOS Sierra drive to continue.