“I moved to a new mix room and needed to measure, Reference 4 Measure would no longer work on my currect MacOS so I pretty much had to upgrade. But it worked rock solid on my existing presets all the way up until now. The upgrade process was simple and if you're familiar with the old version you won't have any issues using SoundID Reference. One thing to be aware of, I purchased from the USA and got hit with a foreign transaction fee. Should have used a different payment method ⋋_⋌”