Playonmac is like wine on Linux, right? I guess etpro doesn't work on wine because among other things it had a built-in anticheat and maybe other protections that probably call some OS functions or rely on things that aren't emulated properly by wine.
If you really want to play etpro, maybe you could try running the Linux version of ET from a Linux live cd, provided that said livecd supports your graphics card
oh its so bad . i just downloaded vmware. it installs a windows on my mac as partition. gonna try this out next days.
really bad its the only mod not working and the one i rly like to play thx anyway!