I purchased a new iMac about two weeks ago and successfully transferred Indigo 7.4.1 to it and got my reflector activated, etc. Everything was working fine. Yesterday, I installed a new graphics tablet, a Wacom Intuos Pro tablet and after that lost the ability to connect with the Powerlinc or enable or disable it. I turned off the tablet, disconnected it from the computer, switched out the usb cable, unplugged the Powerlinc, rebooted, etc., without benefit. Fortunately, I had an unused older laptop running Mac OS 10.13.6 and again transferred everything to this "new computer," that did not have a tablet installed. After struggling with the transfer and reflector activation, everything worked perfectly with the same Powerlinc, usb cable, etc. This proves, I think, that the problem is the tablet and its drivers.
I found an old post about someone who had intermittent problems with a Powerlinc after installing a tablet but little else. Anyone with insight into this problem. I've got the system working but now need two computers to do what always was accomplished with one before.
Thanks