I think your best bet for running PHP on a mac would be to update to OSX. I am running the Apache server that comes integrated with OSX and I have installed PHP.
One of the great things about running a OSX system and being a PHP developer is that you can bypass all of that FTP uploading (assuming you are at home, as I am) and just test it locally.
If you are looking for a tutorial on how to install PHP and MySQL onto a OSX system, www.webmonkey.com has a good one.
Good luck,
Amitrus