Over recent years there have been more requests for this than anything else! Well, it should be ready for public release quite soon.
The Mac edition of Plant Base is a direct port from the Windows program and coded in the same language – the spectacular PureBasic from Fantaisie Software. A large part of the program is exactly the same as the current Windows release and this has greatly helped in speeding along the development. The Mac operating system is however quite different (and new to me!), so a fair number of changes were needed to switch over and adapt things that are specific to the two environments. The bulk of this work is done, leaving mainly finer details still to be tweaked and of course some extended testing.