Unsanity was a macOS shareware software developer founded in May 2000, notable for coining the term "haxie".

[1] While Apple had offered an official extension system in MacOS 9, no similar add-on architecture existed upon the release of Mac OS X. Unsanity coined the term "haxie" (from "hack Mac OS X") to describe retrofits or tweaks made to the Mac OS X system.

[4] Because the haxies injected code into unintended locations, they could cause unexpected software issues.

Other third-party developers would blame haxies as the culprit if their own applications unexpectedly quit, and Apple went so far as to say it would ignore submitted crash logs submitted from a system with Application Enhancer installed.

[6] Some software, such as Windowshade X, did have Snow Leopard versions released,[7] but compatibility would be short-lived; Mac OS X Lion was entirely incompatible with Unsanity's Application Enhancer utilities.