Steam all day, especially after this disaster of expired certificates this year [0]. I had a copy of a game from 2007 that will probably never be touched by the developers again, which leaves me $20 in the hole with a broken game. I bought it again from Steam, works better than the App Store version ever did.<p>[0]: <a href="http:&#x2F;&#x2F;www.macrumors.com&#x2F;2015&#x2F;11&#x2F;17&#x2F;apple-responds-mac-app-store-certificate&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.macrumors.com&#x2F;2015&#x2F;11&#x2F;17&#x2F;apple-responds-mac-app-s...</a>