MacOS upgrade from Sierra 10.12.6 to Big Sur
How can I upgrade to macOS Big Sur, when my current version is the old macOS Sierra10.12.6?
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Upgrade macOS to macOS Big Sur 11
- Check compatibility first
https://support.apple.com/en-us/HT201475
https://support.apple.com/en-my/macos
2. Check Applications Compatibility.
How to get old versions of macOS
If your Mac isn't compatible with the latest macOS, you might still be able to upgrade to an earlier macOS, such as macOS Catalina, Mojave, High Sierra, Sierra, or El Capitan.