Operating system
How do I install an up to date operating system?
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Do NOT upgrade until you have made a Time Machine or other backup of your startup drive.
How to Upgrade macOS:
The macOS version you can upgrade to depends on the year your Mac was released.
Click the (Apple) menu at the top left of your screen and choose About This Mac.
macOS 10.13 High Sierra is compatible with the Macs listed here:
https://support.apple.com/kb/sp765?locale=en_US
macOS 10.14 Mojave is compatible with the Macs listed here:
https://support.apple.com/kb/SP777?locale=en_US
macOS 10.15 Catalina is compatible with the Macs listed here:
https://support.apple.com/en-us/HT210222
macOS 11 Big Sur is compatible with the Macs listed here:
https://support.apple.com/en-us/HT211238
❗️ – IMPORTANT – Backup your data, now, before you attempt an upgrade.
Learn How to Back up your Mac with Time Machine:
https://support.apple.com/en-us/HT201250
❗️ – IMPORTANT – NONE of your 32-bit apps will work in Catalina or Big Sur.
https://support.apple.com/en-us/HT208436
Use this free utility to check the compatibility of your apps:
St. Claire Software – Go64: https://www.stclairsoft.com/Go64/
🖥 – Check compatibility of your Mac with newer versions of macOS.
https://support.apple.com/en-us/HT201475
✅ - Using Safari only, download the macOS upgrade installer app:
Click > High Sierra, Mojave, Catalina or Big Sur.
Once downloaded, double-click the installer app in the Applications folder to begin the upgrade.
