Original: Tiger was released to the public on 29 April 2005 for US$ 129.95 as the successor to Mac OS X Panther ( version 10.3 ) , which had been released 18 months earlier .
Simplified: Mac OS X Tiger ( version 10.4 ) is the fifth major release of Apples Mac OS X/O. It was released on April 29 , 2005 .