Full software, not an App! Definitely not available on the App Store

Current Version

4.97, released April 18, 2018

What's new in this version?



Apple-branded computer with any of the following operating systems:

For older systems, look here.
For macOS 10.12 Sierra, please use TinkerTool System 5.


If you are a registered user of a previous version of TinkerTool System 4, you can download and use the current version at no cost.


TinkerTool System 4 is a paid upgrade for users who purchased a license for TinkerTool System Release 2 before July 1, 2013 or after October 16, 2014.

TinkerTool System 4 is a free upgrade for users who purchased a license for TinkerTool System Release 2 between July 1, 2013 and October 16, 2014. Eligible customers have received new registrations via email. If you have not received your free upgrade notification due to a changed mail address, please contact us.

Special upgrade offers are not available for users of TinkerTool System 1 (before July 1, 2009).

TinkerTool System 4

TinkerTool System 4TinkerTool System 4 is a collection of system utility features helping you in performing advanced administration tasks on Apple Macintosh computers. The application makes use of a self-adapting user interface which automatically adjusts to the computer model and to the version of OS X you are running. All options available in the current situation are accessible via “panes”, very similar to the techniques you already know from the System Preferences application. The features are controlled via a single window which allows you to use the application as a general toolbox and First Aid assistant. This includes:

TinkerTool System 4

Together with its sister program TinkerTool which is available at no charge, TinkerTool System is a perfect substitute for the following types of system utilities:

TinkerTool System 4 contains all these functions, and much more, but at a reasonable price, and with proven quality. Click on the items in the menu above to learn more about the program and its features.

TinkerTool System 4 is electronically distributed software. You can download the product and fully test it for a limited time before you decide to purchase an unrestricted usage license.