Sometimes, your computer's Bluetooth function may disappear from your Quick Settings, so use these steps to reveal the missing feature.

If you want to share files between an Android phone and a Windows PC but you don't have a cable handy, sharing over Bluetooth is a quick and easy option ...

To connect your Mac to a Bluetooth speaker, you need to go into your computer's System Preferences and pair the devices.

On a Mac, you can just hit the Bluetooth icon in the menu bar and hit "Set Up a Device". Your computer will scan for devices, and your keyboard or mouse should pop up.

Your mouse and keyboard should now be working. After a short time, the Recovery app will appear in the menu bar, and you'll be able to select options and launch apps from the window or the menu bar.

Open a web browser, navigate to Apple's developer downloads page, and download Additional Tools for Xcode 9 [Direct Link] which contains Apple's Bluetooth Explorer utility.