[HELP] Help needed , Loading Map [MAC]

hi, I'm using a mac and when I try to change a map on a server , or start a LAN server with a custom map. It says: "Failed to Load map ... "

The map is located in MAPS and in DOWNLOADED MAPS.

But, I can't load them.

I think it's because I can't edit the package content of teeworlds, and I can only load the maps that are in the package content.

Any ideas ?

Greetz. CuBe