Everybody who has the experience in ORACLE PL/SQL must have fall in love with TOAD. Unfortunately there is no TOAD in MAC OS.
But wait… Right now, there is! You can do some TOAD from Eclipse Plugin and it has all the functionalities like TOAD in Windows. It can connect directly to ORACLE and also POSTGRESQL.
Great Right? Just click this link for complete info –> http://toadworld.com/Blogs/tabid/67/EntryId/881/Connecting-to-Oracle-on-Mac-OS-X-using-Toad-Extension-for-Eclipse.aspx