Remap HHKB Pro Eject key to Media Play/Pause Run in a terminal hidutil property --set '{"UserKeyMapping":[{"HIDKeyboardModifierMappingSrc":0xC000000B8,"HIDKeyboardModifierMappingDst":0xC000000CD}]}' Add remap on startup
System Design Cheatsheet Picking the right architecture = Picking the right battles + Managing trade-offs Basic Steps Clarify and agree on the scope of the system User cases (description of sequences of events that, taken together, lead to a system doing something useful) Who is going to use it? How are they going to use it?