Perry;

Not Yosemite problem, but newer machine problem:
SSD machines have no SMS hardware, so all PLOrk canon examples
that use the accelerometers like droner, my LORx Aeterna, BBLVL,
etc. die on launch. I've hacked versions that check for SMS, then
fail by opening up a listen for TouchOSC tilt messages thread.
Then you can just lay your phone on the computer and it all works fine.

Logical, but I did not see that coming :-). You may be interested to learn that other brands of portable computer have at the same time been introducing tilt sensors; laptops with touch-screens and a tablet mode tend to have those sensors so the display orientation adapts to turning the device about when in "tablet mode". The laptop I'm typing on has them and so I can tell you there is no easy standard for dealing with them on Linux, but Windows 8 and onwards may have a standardised abstraction for them. If so that could keep some of the compositions that depend on them playable.

Yours,

Kas.