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by _qxjp
1034 days ago
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An excellent software project, preservation is a personal favorite ;). I had a look over the blog and GitHub project - but I have one important question that I could not find an answer for: "Which version of macOS is targeted?" I would assume only the latest or near-latest version, though it is mentioned in this post that they were only recently able to sync source code up to macOS 11.5 (from August 2021). My theories: either they aim to support a wide array of macOS versions (like Wine), or adopt a "moving target" approach, removing old code and stubs that handle old/removed Mac functions. I am leaning towards my second theory, as it was mentioned in issue #1337 (heh) that Darwin does not have a stable ABI. That sounds to me like an app built for 10.7 Lion would not run at all on 10.14 Mojave... something that is probably true for real Macs as well. |
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In practice, on real Macs, most apps built targeting 10.7 Lion will work on 10.14 Mojave. Some apps will be a bit buggy but still basically work.
If you asked about 10.7 and Ventura, then I'd give it more like a 50/50 chance the app would work (possibly via Rosetta 2 depending on your hardware).
Backwards compatibility on macOS is quite bad, and it has gotten much worse in the last few years in particular, but it's not quite as bad as some seem to imagine.