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Launch it again, right after that warning pop up, go to system settings:
Privacy & Security > scroll down
it should appear near the bottom where the PowerMate app is listed, then a button next to it for you to choose "open anyway", or something to that effect.

Thanks so much! Worked like a charm. Have a wonderful day!
 
Great to see that the old PowerMate still works, even with macOS Sonoma! (followed the instructions given on this thread).

Is anyone still using Powermate with Logic Pro or Final Cut? I am trying to get Powermate to scroll the timelines, but I cannot find in the shortcuts for the programs a way to have the timelines scroll smoothly as if you are using the trackpad etc. Anyone have the program keys for it to work (or would be willing to export your setting from the Powermate programs so we can use it?). much appreciate any help. Thanks!
 
I switched to using BetterTouchTool, which has the ability to monitor USB devices. Since I use it for other things and it is native, it is preferred.
 
Great to see that the old PowerMate still works, even with macOS Sonoma! (followed the instructions given on this thread).

Is anyone still using Powermate with Logic Pro or Final Cut? I am trying to get Powermate to scroll the timelines, but I cannot find in the shortcuts for the programs a way to have the timelines scroll smoothly as if you are using the trackpad etc. Anyone have the program keys for it to work (or would be willing to export your setting from the Powermate programs so we can use it?). much appreciate any help. Thanks!
Apple's trackpads get exclusive proprietary software tweaks that no other hardware makers can imitate. Peripherals like PowerMate typically rely on using keyboard key strokes in very short bursts to imitate smoothness, and it depends app by app in how repeating keystrokes are interpreted.

The best you can do is to turn down the repeat delay and then also decrease the increment of which each shortcut key does to the app. For example, in Adobe apps the default of one arrow key press is to move objects by 0.1mm. I can then change this to 0.01 mm, but tell PowerMate driver to repeat this with no delay and across short turn, so then I can get a more precise and smoother than keyboard press. The drawback is the app sometimes get overwhelmed by inputs and lags behind, which is worse than not having tuned this way.
 
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