Can I update macOS Sierra 10.12.16 on my MacBook Pro 13"?

Back up your data, check the application compatibility table, click here, and then on the download link for a newer OS. Your computer can be upgraded at least as far as High Sierra; without knowing the model year, it's not possible to say what its maximum one is.

Catalina and above won't run 32-bit software and split the functions of iTunes up; if you choose one of them, use Go64 as well.

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