AstroDMx Technical Help for macOS

Installing AstroDMx Capture

Installing AstroDMx Capture is straightforward on macOS, however, due to the fact that the developer does not sign the installers, you will need to grant permission for the application to run. The procedure for doing so is detailed below.

New Procedure – 2024/03/17

1. Double click on the downloaded AstroDMx Capture DMG file
2. Drag AstroDMx Capture.app into /Applications
3. Launch a terminal and type the following:
4. xattr -cr /Applications/AstroDMx\ Capture.app
5. Press enter

Old Procedure – Not necessary if the above procedure works.

• Download the DMG file if using macOS High Sierra or above, otherwise download the ZIP file;
• Double Click on the DMG or ZIP file to extract its contents;
• Copy the app file into /Applications.

After installing AstroDMx Capture, run the application in the usual way. The application will not start and you will see a message similar to the following screenshot.

This message is coming from Apple Gatekeeper and is simply informing you that the application needs additional approval to run. This happens because the developer of AstroDMx Capture has not paid Apple to sign the application. The fee to sign applications is very high and, as AstroDMx Capture is a free application, it is not worth the considerable yearly expense to do so. It is, however, very simply to override this and the following few simple steps detail how to override Gatekeeper.

Steps to Override Gatekeeper

Simply click “Cancel” on the message and then go into “System Settings” and then click on “Security and Privacy”. Doing so will open your Mac’s security settings and will allow you to override Gatekeeper and run AstroDMx Capture.

After clicking “Cancel” and invoking Security & Privacy, you should see a screen that looks similar to the following screenshot.

Make sure that you have clicked the “General” tab. At the bottom of this dialog you will see “Allow apps downloaded from” and below that, you should see “AstroDMx_Capture.app”. To the right of “AstroDMx_Capture.app” you should see a button called “Open Anyway”. Simply click this button to grant the application permission to run on your Mac.

After clicking “Open Anyway” you will receive one final message which will look like the following screenshot.

The final stage is to simply click on the “Open” button, after you have done this the application should open normally and you will not need to do this again until you install a new version of the application. Unfortunately, you will have to repeat this procedure each time you upgrade AstroDMx Capture. If you have any problems with the above, then please feel free to contact the developer.