Allow building macOS apps targeting 10.14 or 10.15 macOS version

[natsuk4ze]

Allow building macOS apps targeting 10.14 or 10.15 macOS version

[natsuk4ze]

Thank you for your contribution 🤝 @SleepySquash

There is a possibility to make macOS 10.15 the lowest supported version, but before that we need to investigate the API.

I wonder, whether .swift files will build at all

Yes. This is because the main function for saving, PHAssetChangeRequest in photo-kit, is only available on macOS 10.15 or later. See #146.
For that reason, 10.14 and below will not be added to support at all at this time.

macOS targets lower than 11.0, and instead throw UnsupportedError
Perhaps Gal.isSupported() might be added to know, whether gal is available

This does not look good for me. Users should check the supported version of a plugin and expect to be able to use all features within that version. They do not expect to get errors only with older versions.

[SleepySquash]

@natsuk4ze, oh, sorry for not noticing the issue you mentioned, it's my mistake, I apologise for your time taken.

Thank you for the detailed answer! After investigating the macOS Big Sur supported devices, I suppose, it doesn't really make sense to target 10.15 instead of 11.0. Main reason I hoped for version downgrade is Mojave, as it is the last macOS to support 32 bit applications, and some users may stick with it only because of that. And since that doesn't work out, I guess, everything is ok.

They do not expect to get errors only with older versions

Well, I do agree. It is indeed better to know the package works on every OS version the application is built for.

I'm closing the issue. Thank you for your time!

[natsuk4ze]

I'm closing the issue. Thank you for your time!

You're welcome. Thanks again for your contribution 😊 @SleepySquash