I am new to the Mac world and I'm looking for PHP development tools, right now the most important thing is the editor. Syntax highlighting and a file tree list are mandatory, of course, and code insight would be nice (of course :). I am hoping that there are free editors out there that provide these functionality and I hope someone could enlighten me. I have been searching on Google but most of the results were comparing their PHP editor with free ones or were poor editors that didn't even offer building projects and a tree list.
Could someone help me out?