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 Speak or SH-201 Librarian, which might be similar to dpMeterXT.