I have the game (PoE1)on a Mac right now, and I can't figure a way to install the most recent IE mod. Does anyone know a way? I've tried copying the patched dll. from a windows version, but it does not work (the game does open, and IE mod is there, with all the options, but it doesn't allow me to load a save or even start a new game). Also tried opening patchwork with playitonmac but it gives a missing key error when patching the mod.

Any help would be much appreciated

I know this is far too late for you, but I might as well put this here for posterity. Mods that modify DLL in any game won’t work for Mac. Macs do not use DLLs. It’s one of the main distinguishing features between Mac and Windows software.