Daring Fireball

It has its own computer platform: 100 percent of software development for the iPhone, iPad, and Watch (and Mac apps) occurs on Macs. There’s no other way to assemble software for those devices. Even with the highest-end Mac hardware currently available, developers strain against the amount of time it can take to compile and test builds, whether in Mac-based emulators or when cross-loaded onto a developers’ test devices.