how has that changed over the past 20 years? the proprietary parts of Mac OS X and now macOS have been proprietary from the beginning
There used to be a bootable Darwin instance that Apple published, which on paper would've made things a bit easier, but they stopped publishing it a while ago. It never resulted in any serious OS with a UI however.
There used to be a bootable Darwin instance that Apple published, which on paper would've made things a bit easier, but they stopped publishing it a while ago. It never resulted in any serious OS with a UI however.