GuitarLog 1.13 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program lies within Education Tools, more precisely Teaching Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This Mac app was originally designed by Meticulous Technology, Inc.
From the developer:
GuitarLog is the place for you to organize your guitar practice sessions and record your progress. The program can help you organize daily practice regimens and their resources while also providing a comprehensive archive of past practice sessions, song ideas, riffs, or whatever you want to record with it.
You may want to check out more software for Mac, such as FRS Money Math, FRS Clocks and Time or ExamView Pro, which might be related to GuitarLog.