Mac OS X 10.0.1

Mac OS X 10.0.1 is the first-ever update to Mac OS X, as well as to Mac OS X 10.0 "Cheetah". It was released on April 13, 2001, and its build number is 4L13.

What's New in Mac OS X 10.0.1
The improvements included better support for third-party USB devices, Classic environment compatibility and overall application support. Support for the Secure Shell service was also improved, and for Japanese users, an update to the Epson printer drivers was made available.

Users were required to download Software Update 1.3.1 prior to installing Mac OS X 10.0.1.

Sources and References

 * Release improvements from Apple's Software Update utility