I just started using the mac client recently and I'm having the same problem as Nalrok. My client just up and quits a lot with no error message. I do get errors in my log when it crashes. It's always the same type of error, see below:
10-09-20 1:36:32 PM [0x0-0xb00b0].com.transgaming.cityofheroes cider_noui(1372,0x708cea00) malloc: *** mmap(size=16777216) failed (error code=12)
10-09-20 1:36:32 PM [0x0-0xb00b0].com.transgaming.cityofheroes *** error: can't allocate region
10-09-20 1:36:32 PM [0x0-0xb00b0].com.transgaming.cityofheroes *** set a breakpoint in malloc_error_break to debug
10-09-20 1:47:19 PM [0x0-0xb00b0].com.transgaming.cityofheroes cider_noui(1372,0x708cea00) malloc: *** mmap(size=16777216) failed (error code=12)
10-09-20 1:47:19 PM [0x0-0xb00b0].com.transgaming.cityofheroes *** error: can't allocate region
10-09-20 1:47:19 PM [0x0-0xb00b0].com.transgaming.cityofheroes *** set a breakpoint in malloc_error_break to debug
My system is:
Model Name: iMac
Model Identifier: iMac8,1
Processor Name: Intel Core 2 Duo
Processor Speed: 3.06 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
System Version: Mac OS X 10.6.4 (10F569)
64-bit Kernel and Extensions: No
Chipset Model: NVIDIA GeForce 8800 GS
VRAM (Total): 512 MB
Looks like it's crashing simply trying to allocate some memory to the game. Using the /unloadgfx command before zoning got me a 4 hour session without crashing. But it's kinda annoying and easy to forget.