Ar, Macs are difficult ay?
1.) I do believe there is a Mac way to take a screenshot, did it come with a keyboard? Or........ I think the PC one should work, make sure you are pressing Prt Sc to take a screenie.
2.) I think your new computer is having issues handling the mods your adding back into the game. Try removing some, you can fjnd default files here by Bawfle. (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=44252.0) Or, try changing your rendering system or turning down rendering distance ^^
Hope these help ya!
~ Whisper
Right after I posted this my game stopped running completely. I reinstalled it and only put a marking pack in and left the rest of the mods out. It still kept crashing, and once it does it simply will not reopen.
I've again reinstalled and left all mods out completely, and I'll see how that goes. It's been running through Wine, so is it possible finding another program for it to go through could help? I honestly know nothing about any of it, I just don't want to give up on playing.
I also just wanted to add that you might've put the items you downloaded in the wrong files.
When the game won't reopen, for me, I usually just have to re-start my laptop.
If it still doesn't work, I'd recommend re-downloading Feral Heart again but leave out any mods, items, markings etc.