You can't jump out and steal other people's cars in the original Driver. AFAIK, there's no way to reduce your felony rating in each mission.
MacSoft has not announced a Mac version of Driver 2, but they generally base their decisions on whether or not to do a sequel on the sales of the original title. So, if Driver for the Mac sells well, then expect Driver 2 on the Mac. If not, MacSoft will spend their time and money on a title that they feel will do better.