For many macOS users BBEdit is the editor of choice, and while there was a language module for the Linden Scripting Language (LSL) available, it had not been updated for a long time. Download an updated version, where all the additions to LSL through November 2016 have been added.
In addition all OSSL keywords and constants have been added.
The plist needs to be installed in ~Library/Application Support/BBEdit/Language Modules, and a restart of BBEdit will pick it up.
BBEdit has been around like “forever” and was first launched April 12, 1992 on Macintosh System Software 6.
LSL is used for scripting virtual worlds in SecondLife and OpenSim grids.
The language module can also be used with TextWrangler.