Converting FLAC Files

I have a very large hard drive full of FLAC and WMA files which for whatever (probably simple) reason can't be read or played on a MacBook I recently acquired--how do I convert the files so they're usable with the Mac?
Thanks in advance....
If you want metadata in your .wav files MP3TAG is a program that should help. It supports all common formats.
audioengr - I am not a fan of FLAC because the SQ is inferior to .wav. I don’t care if you cannot hear the difference. I can hear the difference.
Steve, I agree with you, but flac still has the advantage from a disk space utilization perspective. Point is, store the data as flac, listen as wav. If you have as much music as I do, you shall become a "fan". :)