The LaserWriter 4/600 PS was the last low-end LaserWriter; it supports 600 dpi resolution. Its only connection is for LocalTalk networking.
The Color LaserWriter 12/600 PS was a no compromise color laser printer with 600 dot-per-inch output, 110 lb. of weight, and gorgeous output. It uses four separate toner cartridges – black, cyan, yellow, and magenta.