Download of dpMeterXT 1.1.9 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This Mac application was originally created by tb-software. The software is included in Audio & Video Tools.
From the developer:
dpMeterXT is a loudness metering plug-in. The app is compliant with the EBU R128, ITU-R BS.1770/1771, ATSC A/85 and several other region-specific loudness standards. dPMeterXT supports multiple channel configurations, from 1.0 up to 9.1/10.0, depending on your system configuration or DAW capabilities. It features large readouts, meters, graphs, measurement history, and data logging.
You may want to check out more Mac applications, such as M-Audio Key Rig or Speak, which might be similar to dpMeterXT.