If you’re intending to upgrade to Catalina, even early next year, perhaps, one of the first questions you need to ask is whether your important apps will run in macOS 10.15. In many previous macOS upgrades, this hasn’t been such an important question, and the answer has usually been far simpler. One of the problems with upgrading now is that some apps won’t just be a bit rough, but will stop working altogether when you upgrade.
Apps you’ve already run
When you’ve already installed and run an app, the situation is more clear, as it has already undergone that crucial ‘first run’ in which it undergoes full Gatekeeper checks, if it was downloaded from the Internet. Therefore the most important consideration is whether the app is fully 64-bit compatible.
Although tools like St. Clair Software’s free Go64 and my own free 32-bitCheck will scan for potential problems, the only app that I know which will test a specific app is my free ArchiChect.
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