I use keep 2 versions of PMS on my Mac. The current version for normal use streaming to a PS3 and to a WDTV, and I also keep 1.53 to use when watching Game of Thrones since other versions slow down the audio extremely after the 'previously on' part. All of a sudden, 1.53 won't detect any renderers. I haven't done any PS3 updates, nor any updates to my Mac. I also had 1.80 on my Mac and it wasn't working suddenly. I saw a newer version was out, so I updated and 1.81 works fine, but 1.53 still no luck. Leads me to think suddenly older versions aren't live anymore. Any thoughts on whether this is true or any thoughts as to why 1.53 suddenly won't work without any changes? Thanks in advance for any help.