The Society of Biblical Literature has made available a beta version of their SBL Hebrew Font. It’s a very clean, versatile Unicode font:
It’s distributed in OpenType TTF format, designed primarily for Win2000 and later, but you can also use it on MacOS X. However, since MacOS X (even version 10.3) does not yet support complex script (i.e. Hebrew) rendering as well as Windows does, your mileage may vary.