Upgrade

To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac.

Yosemite

Similar to Mavericks, (OS X 10.9), Mountain Lion (OS X 10.8) and Lion (OS X 10.7), Apple’s upgrade to Yosemite is a pretty major one, but will be really simple to install. But before you do that, you should perform a few tasks to ensure that you’re Mac is ready to go.

Can You Upgrade From Lion To Yosemite

Learn how to upgrade to macOS Big Sur, the latest version of macOS.

Check compatibility

Reinstalling Yosemite on a computer already running it. Reinstalling while keeping files, applications, and settings; Reinstalling while erasing everything on your computer; Upgrading from previous versions to OS X 10.10 (Yosemite) OS X 10.10 (Yosemite) is no longer available for purchase from the Mac App Store. Bottom line: Should you upgrade to OS X Yosemite? By Christopher Breen. Mavericks and, perhaps, Mountain Lion, probably weren’t either. Apple’s been building this bridge for a long time. The Apple Company introduces the new operating system that they will begin to use the Mac this year: the Yosemite. The version will replace the current operating system OS X Maverick. The OS will come with some important changes, especially, in the form of icon images. Furthermore, Apple wants their users to upgrade to this version.

Upgrade imac from lion to yosemite

The version of macOS that came with your Mac is the earliest version it can use. For example, if your Mac came with macOS Big Sur, it will not accept installation of macOS Catalina or earlier.

Upgrade Lion To Yosemite

If a macOS can't be used on your Mac, the App Store or installer will let you know. For example, it might say that it's not compatible with this device or is too old to be opened on this version of macOS. To confirm compatibility before downloading, check the minimum hardware requirements:

  • macOS Catalina 10.15 hardware requirements
  • macOS Mojave 10.14 hardware requirements
  • macOS High Sierra 10.13 hardware requirements
  • macOS Sierra 10.12 hardware requirements
  • OS X El Capitan 10.11 hardware requirements
  • OS X Yosemite 10.10 hardware requirements

Download macOS using Safari on your Mac

Safari uses these links to find the old installers in the App Store. After downloading from the App Store, the installer opens automatically.

  • macOS Catalina 10.15 can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks
  • macOS Mojave 10.14 can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
  • macOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion

Upgrade Os X Mountain Lion To Yosemite

Safari downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.

Upgrade Mountain Lion To Yosemite

  • macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion
  • OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard
  • OS X Yosemite 10.10can upgrade Mavericks, Mountain Lion, Lion, or Snow Leopard