Re: Mac's Killer app?
The subtitle doesn't make any claim to timeframe - Photoshop _was_ a bit of a killer app on the Mac. Arguably, PageMaker was _the_ killer app for the Mac (i.e. people would buy into the platform merely for the software), but Photoshop was a big draw to the platform in the early 90s for photography studios, movie studios and the like. The first version released for Windows was released ~ 3 years later.