How to Connect an iPhone to a Mac BlueTooth to Make Speaker Phone Calls
The iPhone is compatible with a variety of BlueTooth devices, including keyboards and ear pieces. To use a Mac BlueTooth with your iPhone for phone calls, you must first pair the two devices. When BlueTooth is enabled, your iPhone will automatically detect new calls and let you answer them via the earpiece. To make a phone call into a speaker call, just tap the "Speaker" icon on the menu that appears during the call.
Turn on the Mac BlueTooth device and set it to discoverable mode per the manufacturer's instructions. Discoverable mode lets the BlueTooth become detected by nearby BlueTooth devices, including your iPhone.
Power on your iPhone and tap the "Settings" icon on the home screen. Choose "General" from the "Settings" menu and then tap "Bluetooth."
Tap the "Off" switch to the right of the "Bluetooth" line; the switch is toggled into the "On" position. Wait as the iPhone searches for nearby discoverable devices.
Tap the name of your Mac BlueTooth in the list of available devices.
Enter the PIN or passkey that came with your BlueTooth. If required, follow the manufacturer's instructions to create a connection between the BlueTooth and iPhone.