QuickTime 4.1 runs on Macintosh and Windows computers and requires the following (by platform):
Macintosh- Apple computer with a PowerPC processor
- System 7.5.5 or later
Windows-based PC- Windows-based computer with a Pentium-class processor
- Windows 95, 98, NT 4, or Windows 2000
Note: Although QuickTime 4.1 was not extensively tested with Windows 2000, no significant issues have been identified. A forthcoming update to QuickTime will be fully tested with Windows 2000.