Given the task definition and input, reply with output. In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Mac OS X Tiger ( version 10.4 ) is the fifth major release of Apple 's Mac OS X.

Mac OS X Tiger ( version 10.4 ) is the fifth major release of Mac OS X ( now named macOS ) , Apple 's desktop and server operating system for Mac computers .