We believe the problem may have something to do with the graphics framework and shared system memory. Here are a few things to try if you encounter this problem: Update to macOS It may be that just one module that Lenovo ThinkPad X250 Atheros Bluetooth the source of the trouble. If the update through the App Store does not work correctly, the installer can be downloaded here. If audio does not work, run Kext Utility to repair permissions and rebuild[…]
