Hi,
Since upgrading to 8.0.5 everytime I startup Cubase, the volume of my sound interface on my mac will shoot up to 100% so I will have to manually turn it back down before beginning any work. The same issue occurs on exit, so as I come out of the application the volume will be reset to 100%.
The bug begins right at the Steinberg Hub window, before opening any projects or starting a new project.
I’m running OSX 10.10.2. And have been experiencing this issue now for a couple of weeks in every instance.
Thanks in advance, Leigh.
To anyone experiencing the same issue, I have identified it being due to the ‘Set Device Attenuation To 0 dB’ option being ticked, in the CoreAudio Device Settings window, accessed from the Devise Setup screen. Once I untucked this box, I’ve not experienced this issue since which is a dream! 
Unfortunately, as so much time has now passed, I have no idea whether this issue was brought on by the upgrade to 8.0.5 and if the box was ticked/unticked before or whether it was a massive co-incidence, but thought it was worth putting my findings here in case anyone else has the same frustrating issue.
Not sure how I didn’t spot these with my initial searches, but thanks to these guys for highlighting the issue to me;
Happy Creating. 