I use a USB to serial port adapter to program PLCs. I have been using my Retina MacBook Pro with Fusion for a few years with a Keyspan USA-19HS. I have had no issues with prior upgrades with OS X or Fusion. I was forced to upgrade to Fusion 7 due to my upgrade to OS X Yosemite. Now I cannot connect via my serial port to any PLCs. The problem is with all Siemens, Allen Bradley, and Wago PLCs. I have upgraded my USB driver software and the problem still exists. Do I need to downgrade OS X and Fusion?
↧