You're probably talking bout Mark of the Ninja. Haven't really played it though I do own it and I've heard all the praise

Stealth Bastard is another one. More puzzles but still good. There's one more I can't think of the name of where you have a trench coat

If you liked Bastion, which sadly I did not, you may like that company's other game Transistor. Which I love

I'll probably think up some more when I get home

Though you can browse GOG and filter for just Mac games