Merlin Project 3

Merlin Project 3 is only supported up to OS X 10.10.5

Merlin Project 3 is no longer under development, the version is supported up to maximum OS X 10.10.5 (Yosemite).
The current version of our project management software is Merlin Project 8.

Operating Systems

For a safe use of the software please note the supported operating systems:

minimum OS X 10.9.5 (Mavericks) until maximum OS X 10.10.5 (Yosemite).

Using the software with a newer, unsupported operating system at your own risk!


You can download the latest version here: Merlin Project 3 - Version 3.1.10


Copy the app into your Applications folder and start it from there.


Version 3 was replaced in 2016 by Merlin Project 4, both use the same license.

The license is a small file, not a license number or login to a license database. You can have your license file sent to you at any time. Simply use our online query.

Merlin Project creates a folder on your Mac for your user, where you can find the installed license:
~/Library Application Support/Merlin Project

Merlin Project on the Mac and iPad

Your ideas, our magic – make projects easy! Test now 30 days for free.