10 Nov 07
macosxhints.com - 10.5: Add Quick Look support for certain file formats →
I have a lot of files that contains data in plain text format with different extensions — things like .cfg, .dat and .tex. However, those files are not recognized by the Quick Look viewer. It is possible to make these other files visible with the default Quick Look viewers by simply adding a UTI (Uniform Type Identifiers) file reference to an application’s Info.plist file.