Mac OS 7.0.1

System 7.0.1 was released October 21, 1991. It was mainly a bug-fix update. For Macintosh Portable users, the Portable and Brightness control panels were updated. Additionally, the Caps Lock extension, which showed an up-pointing arrow onscreen if the caps lock key was depressed on PowerBooks (for those laptops which had neither a depressed caps lock key nor a tiny light on the key), was introduced. For Macintosh computers using the Motorola 68040 chip, the Cache Switch control panel was introduced, as well as internal file-system alterations. For those new Macs, RAM disks and sound management were also optimised.