"older OS versions", porting to 10.6 or later vs. 10.10 or later:
I at first intended all the drivers I write for my clients to work on Snow Leopard 10.6, but after actually attempting to do so I settled upon supporting El Capitan 10.11, sometimes just Sierra 12.6. There are some occasional but quite serious problems with new APIs appearing during a minor release so you can't just set your Deployment Target to a major release's first drop. To get drivers to build - and I expect Cocoa code as well - one must take _great_ care to check Apple's doc for most if not all of your API calls to determine when they first appeared. For one particular client's USB function driver we actually had three kernel extensions. I at first planned to package this in just one kext bundle but because of time pressure shipped them as three separate ones. Two of the drivers had Deployment Targets of 10.12, the third 10.11. I had some manner of good reason for doing it this way, but I've just been up all night nosediving deeply into Wikipedia and all manner of Epic Talk Page Flame Wars so just now I'm too thrashed to actually remember what it was. Mike Crawford Portland Custom Software Development http://soggywizards.com m...@soggywizards.com One Must Not Trifle With Wizards For It Makes Us Soggy And Hard To Light _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
