
Also, the normal InputManager mechanism is loaded for all Cocoa applications, providing the possibility of incompatibility and unexpected application behavior.

With normal InputManager hacks, the user must log out and log in. SIMBL bundles may be disabled by removing the plugin and restarting the application. It may also be placed in the user-specific home directories. They can be placed by the user manually through Finder or by an installer to /Library/Application Support/SIMBL/Plugins. Plugins for SIMBL are Cocoa bundles that add various functionality to Cocoa applications. Since SIMBL injects code into running processes, buggy plugins can cause process- or even systemwide problems. In plugin installations, the SIMBL package is automatically installed. In versions of Mac OS X prior to Leopard, SIMBL could be installed per-user. In default installations, it is located in /Library/InputManagers. As such, it is restricted to certain locations depending on the version of Mac OS X installed. SIMBL is installed like any other InputManager. 2.1 Advantages over InputManager Plugins.SIMBL was developed in response to the restrictive licensing and costs of Application Enhancer and the drawbacks of loading code blindly through the InputManager mechanism. The most popular use of SIMBL is to add functionality to the Apple Safari web browser which did not have an Apple-authorized plugin system until version 5 in 2010. Designed for Solomon's PithHelmet, SIMBL is now used by other developers.

Plugins using SIMBL have advantages over normal InputManager modifications such as targeted code loading into specific applications. SIMBL loads code via the InputManager system, which was developed to support foreign input methods. It helps third-party developers modify and add functionality to applications developed with the Cocoa environment without access to the source code.
MYSIMBL TYPESTATUS FOR MAC OS X
SIMBL (short for SIMple Bundle Loader, formerly Smart InputManager Bundle Loader, and pronounced like symbol or cymbal), is an application enhancement (InputManager bundle) loader for Mac OS X developed by Mike Solomon.
