Hi,
To make Edirol UA-25 work again, you need to unplug the USB cable, switch off advance mode (next to USB cable) and reconnect again. Device will work now again, however you won't be able to control the volume via keyboard.
iMac, macOS High Sierra (10.13.3)
Standard (non-advanced) mode only works on High Sierra because it uses the built-in OS-X driver and is subject to the limitations of that driver. Without the UA-25's own driver, which enables advanced mode, the sample rate will be fixed at 44.1 kHz/16-bit (regardless of the sample rate switch setting) and the MIDI interface will not function at all.
While I got many years of good use out of my UA-25 and the hardware is still good, it is now useless to me because I can no longer use it for professional-quality recording and I can no longer connect my MIDI keyboard to my Mac.
Alas the only "fix" is for Roland to update their driver.
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Edirol UA-25 in High Sierra fix
