I wouldn’t be so pessimistic about macOS or even iOS update rates. Its considerably quicker than you think. IMS, they announce upgrade rates during public earnings report conference calls typically to brag about how well a new OS is being received by the public over previous releases or competing OSs.
re Cocoa being deprecated: I think you have some time. A lot of apps/components in the OS are written in Obj-C and it is a big undertaking to convert them all. Not something that can feasibly be done in a year or two. Remember how long it took Finder to switch from Carbon to Cocoa? And even then it was half Carbon & half Cocoa. It took a couple releases for it be all Cocoa. Not to mention Carbon was officially deprecated in 10.8 (back in 2012) and is only now dead in 10.15 (2019). So I think Cocoa still has a good number of years of life left before it is deprecated and even more years before it is dead. —Rob > On Nov 14, 2019, at 12:30 PM, Pier Bover via Cocoa-dev > <[email protected]> wrote: > >> Well I think the point is to go SwiftUI > > What if you want to support previous macOS versions older than Catalina? > > I doubt the majority of users will update to Catalina for at least 1-2 > years. > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > 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/petrock%40mac.com > > This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
