T
- Tailgate – iMac (Bondi Blue)
- Tangent – Power Mac G4 (Digital Audio)
- Tanzania – Power Macintosh 4400
- Tempest – Macintosh Quadra 660AV
- Tempo – Mac OS 8
- Tenspeed - Apple IIGS ROM 3
- Terminator – System Software 6
- Tessera – iMac G4 (flat panel)
- TFS (Turbo File System) – HFS
- Tiger – Mac OS X 10.4
- Tiger – Mac OS X Server 10.4
- Tigger – Mac OS X Server 10.2
- Tim – PowerBook 170
- Tim Lite – PowerBook 140
- Timberline - iPhone OS 2.2
- Titan – Power Mac G4 (Quicksilver)
- TNT – Power Macintosh 7500
- Trailblazer – Power Macintosh 5200/5300 LC
- Transformer – Power Macintosh 5200/5300 LC
- Trinity – Power Mac G4 Cube
- Tsunami – Power Macintosh 9500
- Twiggy – Mac mini
- Typhoon – 2.88 MB ED floppy disk drive planned for the Macintosh Quadra 840AV
Read more about this topic: List Of Apple Codenames