While we don’t need to understand the difference between 32-bit and 64-bit apps, we do need to know if any of the programs we use on a daily basis are still 32-bit. This year’s release deserves this kind of careful attention because 32-bit applications will stop working on Macs with macOS Catalina installed. Uninformed users performed the “free” upgrade and found themselves facing hundreds of dollars of upgrades to other software. One notable exception, was Mac OS X Lion in 2011, which discontinued support for ALL applications written before 2006. In most releases of macOS, we usually gain features while losing little if anything from past systems. In recent years “fall” has meant late September, which is less than 2 months away from this writing. It will be available in “the fall,” according to Apple. If you already have Catalina, Big Sur or Monterey you’ve already broken all of the apps that are going to be broken because of the change to 64 bit apps.Īpple’s new operating system for Macintosh computers is going to be called macOS Catalina. UPDATE FALL 2021: The following applies not only to Catalina, but also to the newer Big Sur, Monterey and all macOS versions going forward.
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