1. Download http://downloads.xiph.org/releases/xiph-qt/xiph-qt-0.1.9.dmg , extract it and put the “XiphQT” to /System/Library/Components/ (if you it not already have)
2. Download http://people.xiph.org/~arek/flac_import/flac_import_0.5b1_p0.1.dmg and put the “FLACImport.component” to /Library/QuickTime/
3. Restart any QickTime Application. To be sure restart the Computer. QuickTime can now play the FLAC files, but iTunes can it not yet.
4. Download http://people.xiph.org/~arek/flac_import/set-OggS-0.1.dmg , extract it and put it wherever you want (maybe desktop).
5. To play a file, drag and drop it over the “Set OggS” icon. This will create a ._”FILENAME” for every file, so that iTunes can import and play it.
6. To clear that, delete the ._”FILENAME” files or drag and drop the FLAC’s over the “Clear OggS” icon.