OS X Yosemite upgrade

If your Mac is in the following list, then the only version available for upgrade is Mojave. Otherwise, How to upgrade to macOS High Sierra.

MacOS Mojave Compatibility List of Supported Macs

Apple has said that any Mac introduced in mid-2012 or later will support macOS Mojave, along with the 2010 and 2012 Mac Pro models if they have a Metal capable GPU. That’s fairly descriptive, but if you want a specific list of supported Mac hardware for macOS Mojave 10.14 then the following should be helpful to you:

• MacBook Pro (mid-2012 and newer)
• MacBook Air (mid-2012 and newer)
• MacBook (early 2015 and later)
• iMac (late 2012 or newer)
• iMac Pro (2017 or newer)
• Mac Pro (late 2013 or newer, or mid-2010 and mid-2012 models with Metal capable GPU)
• Mac Mini (late 2012 or newer)

As you can see from the list, basically every Mac that was introduced from mid-2012 onward supports macOS Mojave, along with a few earlier Mac Pro models. The supported hardware list for macOS 10.14 is a bit more restrictive than prior macOS system software releases, perhaps indicating that the latest software version will be more demanding on resources or simply just require particular system architecture components that are only available on more modern Macintosh hardware.

Get MacOS Mojave now from the Mac App Store

What type of computer and what is the model year?

Check to make sure your applications are compatible. PowerPC applications are no longer supported after 10.6.

Application Compatibility

El Capitan 10.11 Compatibility information

macOS Sierra 10.12: Compatible Apps

Also check to make sure there is a compatible driver for your printer.

Do a backup before installing, preferable 2 backups on 2 different drives.

Any Mac with Yosemite can be upgraded to either El Capitan, High Sierra, or Mojave depending on what model/year Mac you have. They can be downloaded on the Mac App Store.