- Joined
- Jan 31, 2008
- Messages
- 375
- Reaction score
- 8
- Points
- 18
- Location
- Chicago
- Your Mac's Specs
- 2.53 Intel Core Duo Mac Mini; 4g RAM; 350g HD, OS 10.6.3
The fourth RAM slot was included in the models before the DA, the Gigabit Ethernet and Sawtooth. As bryphotoguy said, OS 9 could only recognize 1.5GB and three slots became the norm.