Ok, so I just started Tremulos about 3 weeks ago. And I must say addicting game

.
...But I can not play some of the maps, Maps I know for sure I can play are, map-atcs-1.1.0.pk3, map-niveus-1.1.0.pk3, map-karith-1.1.0.pk3, map-transit-1.1.0.pk3, and map-tremor,1.1.0.pk3.
I know where to get the map's at, but when I download them they never work.

If someone can please try and explain it to me how to get the other maps working would help ALOT.
And please try to do it as simple as possible getting use to the hole "Mac" stuff.
And please don't come in here bashing me or other people about this topic.
Thank you,
p00p.