What is Moo?

Moo stands for Mac OS Optimizer [for X].  Moo was designed to incorperate two of the most popular optimization tricks into one freeware application (and now some extra advice for people with older machines).  One is Window Buffer Compression enabling and disabling, the other is prebinding (making applications launch faster) files.

Every time a user in Mac OS X opens a window the system saves the contents to a portion of memory (the "professionals" call this part of RAM the Window Buffer).  No compression is used making this a very inefficient design because more RAM is used then necessary.  By compressing the data in the buffer you free up more RAM allowing your system and applications more space to work with.

Xoptimize, a feature of Moo, prebinds all executables and shared libraries such that the applications load and launch faster.  It accomplishes this task by invoking the update_prebinding command provided with Mac OS X.   This is the same kind of optimization that the installer performs whenever it does the Optimizing System task during installation.   The difference is that Xoptimize can prebind applications and frameworks that were installed by means other than an installer package.

Xoptimize, itself, does not actually modify any files directly.  It is a user interface for a tool-- update_prebinding-- that is provided by Apple.

Download Moo for Mac

Compatibility notes

Emulating this? It could probably run under: SheepShaver