What's Open

See below for the Download button.

Quick Introduction

This is an updated version of WhatsOpen.app v2.1, by Franklin Marmon, released around 2008.

This re-release is a 64 bit app, so that it runs on macOS 10.15 Catalina and later.

See here for a few sites explaining the original app:

Note that this version 4 is based on version 2.1, i.e. it's missing some of the later improvements such as the Eject and Pause commands.

Should you have an interest in having these features brought back, then please contact me if you can supply me with a copy of version 2.5 or later.


Current version: 4.0.1, requires Mac OS X 10.10 or later (Release Notes)

The source code (Xcode) can be downloaded at github


Thanks to the original author, Franklin Marmon, for giving me permission to re-release the application here.