It's incompatible with BSD/MIT in the sense that whatever you combine with this Apple-variant BSD becomes Apple-variant BSD and can't be straight BSD or MIT anymore. In that respect, GPL code is also compatible with BSD/MIT as it can legally be combined, it just becomes GPL and can't be licensed as BSD/MIT anymore either.
As for the GPL notice, I hadn't realized that was added in GPL3, so these additions by Apple would be allowable under GPL3. I don't use GPL3 so hadn't known about that, thanks for the heads up. They wouldn't be compatible with the more-popular GPL2 (Linux and everything else), though, which has no such allowances.
As for the GPL notice, I hadn't realized that was added in GPL3, so these additions by Apple would be allowable under GPL3. I don't use GPL3 so hadn't known about that, thanks for the heads up. They wouldn't be compatible with the more-popular GPL2 (Linux and everything else), though, which has no such allowances.