check insidemacgames.com and also aspyr.com , macplay.com , and macsoftgames.com.
it is doubtful since i dont think any of the need for speed series has been ported, plus ports for mac can be risky sometimes they may take way too long (like No One Lives Forever took) or they are rushed and buggy so they run poorly. Hopefully it will be ported though, the more good games for mac the better