The Shape of Everything
A website mostly about Mac stuff, written by Gus Mueller
» Acorn
» Twitter
» Maybe Pizza?
» Code
» Archive
Apple Platform SDK API Differences

Matt Stevens has a nice site which shows real diffs between the different SDK releases: Apple Platform SDK API Differences. Looks like ImageIO got a whole bunch of new IPTC constants in 10.13.4, and Core Graphics got kCGImageByteOrderDefault, which is kind of weird but OK. I suppose being explicit about that couldn't hurt.