Leopard WebKit is a port of WebKit 604.5.6 to Mac OS X Leopard. It is
roughly equivalent in standards and website compatibility to Safari 11
(as opposed to the system default of Safari 5).

It was last updated in June 2018.

Update:
Added custom Intel builds of Webkit 537 and Webkit 600.

Compatibility
Architecture: PPC x86 (Intel:Mac)

Mac OS X 10.5.8 Leopard