How do I update Safari 12.1.2 on my mac to Safari 14.1?

Back up your data, check your applications for compatibility, and depending on which iMac model you have, click on High Sierra, Mojave, Catalina, Big Sur, or Monterey. If your computer's maximum OS is High Sierra or you choose not to upgrade, use a product such as Firefox for websites requiring a recent web browser.

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Your computer can be upgraded to High Sierra and Safari 13.1.2. If it's a 2012 or newer model, it can also be upgraded to Catalina and Safari 15.

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See the first sentence of my original reply. If you encounter a specific issue, describe it in this thread.

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