Hi,
We've been seeing an intermittent connectivity issue in Yosemite in discovering BLE services, namely scanForPeripheralsWithServices does not return anything. The same code work in iOS without a glitch... We also see the same issue with apps like LightBlue. I've tried different devices with several S110 versions so I'm quite sure the stack is not to blame.
Reboot usually helps though, but that is not much a solution for our users.
Has anyone else here seen similar issues, and come up with a solution?