If Bluetooth (especially on Mavericks) refuses to connect and cannot be switched off it can be restarted (without having to reboot) using these commands from terminal...
My latest blog post: Sheeple: Are they succumbing to fake news, misinformation, and propaganda. (posted 2025-09-24). My latest podcast: OJB's Podcast 2029-09-09 Kiwi Values.