Honestly, the mod there isn't very good.
She very, very rarely takes the time to accept ANYONE. You could wait 3 months and still not get accepted.
She'll also kick out people for NO REASON, only because she decided to go on a kicking spree.
Some members have started a NEW M.A.C Cosmetics livejournal community, and although it's not as active as mac_cosmetics, it won't take 3 or months to get accepted
The link for the new M.A.C community is community.livejournal.com/love_mac
Hope this helps.