About MacVim vs vim and 'color scheme support' and 'solarize': Actually the issue is with Terminal.app which has some weird setup where changing the background is either impossible or always looks horrible.
Also it's particularly difficult to get Solarized setup in a terminal using 256 colors rather than manually resetting the 16 colors of your terminal to custom values.
If you have a sane terminal, vim works fine with 256 color support. A lot of people on OSX use iTerm 2 which I hear has fine 256 color support. I just use gnome-terminal on Linux that's had support forever and dropped solarized since the maintainer is not interested in making any setup work besides gVim/MacVim it seems.
Also it's particularly difficult to get Solarized setup in a terminal using 256 colors rather than manually resetting the 16 colors of your terminal to custom values.
If you have a sane terminal, vim works fine with 256 color support. A lot of people on OSX use iTerm 2 which I hear has fine 256 color support. I just use gnome-terminal on Linux that's had support forever and dropped solarized since the maintainer is not interested in making any setup work besides gVim/MacVim it seems.