Jonathan Levin's MOXiL 2nd Edition volume 3 is out and I recommend you get it. 1st edition is still very good and can hold you off until the other volumes are out.
Amit Singh has a Mac OS X Internals A Systems Approach that is good we well.
There are also various talks at security conferences that detail parts of macOS/iOS.
Amit Singh has a Mac OS X Internals A Systems Approach that is good we well.
There are also various talks at security conferences that detail parts of macOS/iOS.