ctail is a small configurable Bash script which can colour log entries outputted through tail. It actually wraps tail, piping its output through an awk script that colorizes the output according to log severity levels.

A ctail.config file can be used to configure ctail in order to use different colours for various log levels. The file must be in the same folder as ctail. For an example file, please check the ctail.config file from the repository.

Should work on Mac OS X without any modification.