Switch for OSX is another one which can convert to several audio formats including FLAC or AIFF, etc. It is free & easy to use. It can convert from and to a very large number of audio formats. I do not think Switch originally had wma support for Mac but appear to have added it in later versions.

I quite happily use Switch, when needed

My main CD ripping software is XLD, also free. It rips better than iTunes. XLD is a Mac requirement for some private torrent audiophile sites. XLD supports addition of id3 tags for any format that supports tags you convert to. XLD's mp3 uses the LAME codec (far better than iTunes mp3.) Also supports FLAC, apple lossless, mp4, Ogg Vorbis, APE (Monkey Lossless), WavPack, PCM (Big or Little Endian), etc. I usually rip to AIFF first, then convert to FLAC, or to mp3 if intended for iTunes.