We need more games!

The mac doesn't have enough love on steam. I have a mac and I used to have a PC but it broke. Now I can play almost none of my games, even though on other sites they have the same game but for PC and Mac. You Linux people out there also need more love. I have Borderlands 1 yet I can't play it because on steam it does not work for mac. Also, the mac has many issues that the PC doesn't have. Please Valve, give us this.