Freeware · macOS 26

DR.DisplayBrightness - 1.1

Control the brightness of legacy Apple Cinema Displays from the menu bar on current macOS versions.

The brightness of old Apple Cinema Displays can no longer be controlled in modern versions of macOS. This tool lives in the menu bar and can control the following displays when they are connected via USB:

  • Apple Cinema Display 20″, 23″ & 24″
  • Apple LED Cinema Display 24″ & 27″
  • Apple Cinema HD Display 30″

The tool is provided for free as is. You use it completely at your own risk. There is no guarantee or warranty of any kind.

Privacy

All processing is performed locally on your device. This app does not collect personal data and does not send any data to external servers or third parties.

Version history

Version 1.1 — 17 November 2025

Support for reading and decoding EDID information.

Version 1.0 — 15 November 2025

Initial version with support for multiple Cinema Displays.