Just in case others run into this problem, after research, my iMac is using Lion as the OS. Apple doesn't support Samba/SMB like it used to, so I'm told, I can read but Mac will not write to other than an Apple format. I tried some programs that are supposed to solve this but they screw up my Time Machine and give me the same problem writing directly to unRaid. Some, even cost some serious bucks. Go figure. So I decided to get a 2T seagate Central to write my MKV files to and then transfer them to unRaid, it works, but I hate doing things twice. I tried with a cache drive, but no go, as my iMac is still writing to a non-Apple format. So writing from iMac to unRaid seems impossible for now, if anyone has found a solution or is able to connect and write, let me in on it. ~ Thanks, kristisdad