A universal binary of LyX/Mac-1.5.5 has now been released. You can get it here: 1.5.5-Universal<ftp://ftp.lyx.org/pub/lyx/bin/1.5.5/LyX-1.5.5-Mac-Universal.dmg>
Of course, please report any problems to this list. Thanks to Konrad Hofbauer and Anders Ekberg for help compiling this release. Bennett