Windows: Windows 10, with all recommended updates installed. Windows 10 Version 1903 (May 2019 Update) version is required for support of international characters (UTF-8) in filenames and text. Microsoft does not support Windows 8.1 and Windows 7 anymore and Slicer is not tested on these legacy operating system versions, but may still work.
macOS: macOS High Sierra (10.13) or later. Latest public release is recommended.
Linux: Ubuntu 18.04 or later
CentOS 7 or later. Latest LTS (Long-term-support) version is recommended.