Is Maestro 2 compatible with all Apogee products?

Apogee Maestro 2 is the name of the control software for Symphony I/O MKI series and was the control software for the One, Duet, Quartet USB range when used with older versions of macOS.

Other units like Element, Ensemble Thunderbolt, Symphony I/O MKII, and Symphony Control, use newer Apogee Control, Symphony Control, or Apogee Control 2 software. The ONE for iPad & Mac, Duet 2, Duet for iPad & Mac, and Quartet also use Apogee Control 2 software for current versions of macOS.