PengWeb for Legacy Systems is a separate version of the mainstream PengWeb browser for older versions of Windows and Mac OS. Currently, Legacy PengWeb is available for Windows 98+ and Mac OS X 10.4 - 10.14.
Latest Release: 0.2 Beta.
Changelog: http://www.pengos.xyz/downloads/pwlegacy-changelog.html
Known Issues: Currently, many features are unavailable at this time. The back and forward buttons are not functional. Many menu items in the menu bar are also unavailable. As this is an experiment...