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Introduction
All About Wireless
How To Connect At Home
How To Connect On The Go
How to Troubleshoot Wireless Issues
The Future of Wireless
Mac Bt Download Software
Chances are you use at least one Bluetooth wireless peripheral with your Mac. Many folks have a Magic Mouse and a Magic Trackpad paired to their desktop Mac; many also have wireless keyboards, speakers, phones, or other devices connected via Bluetooth wireless.
After all, Bluetooth is just plain convenient, both for devices that are always connected to your Mac, and those you only use occasionally. But Bluetooth connectivity can also cause pull-your-hair-out types of problems when things stop working as expected.
Bluetooth Connection Issues
Most of the problems occur when a Bluetooth device that is paired with a Mac simply stops working. It may be listed as connected, or it may not show up in the list of Bluetooth devices at all; either way, the device no longer seems to work.
Many of you have tried turning the Bluetooth device off and then back on, and even though it may seem a bit silly, that's a very good place to start. But you need to take an additional step, and try turning your Mac’s Bluetooth system off and then back on.
Turn It Off and Back On
Launch System Preferences, and select the Bluetooth preference pane.
Wait a few seconds, and then click the button again; it will have changed its text to read Turn Bluetooth On.
By the way, for easier access to the Mac’s Bluetooth system, place a checkmark in the box labeled Show Bluetooth in menu bar.
So much for the easy solution, but it doesn’t hurt to give it a try before moving on.
Repairing Bluetooth Devices
Most of you have tried repairing your Mac with the device or attempted to disassociate your Mac from the device. In either case, nothing changes and the two just won't cooperate.
Some of you have mentioned that the problem started when you upgraded OS X, or when you changed out batteries in the peripheral. And for some of you, it just happened, for no apparent reason.
A Possible Solution to Bluetooth Problems
A number of things can cause Bluetooth problems, but the one we're going to address here is specific to two common connectivity problems experienced by many users:
Bluetooth devices that never seem to be able to pair with your Mac.
Bluetooth peripherals that were paired successfully, but have stopped working (they may still show up in your list of paired devices).
In both cases, the cause is likely to be corruption of the preference list used by your Mac to store Bluetooth devices and the current state of these devices (connected, not connected, successfully paired, not paired, etc.). The corruption prevents your Mac from updating the data within the file, or from properly reading data from the file, either of which can lead to the problems described above.
Thankfully, the fix is an easy one: delete the bad preference list. But before you start mucking around with preference files, make sure you have a current backup of your data.
How to Remove Your Mac's Bluetooth Preference List
Open a Finder window and navigate to /YourStartupDrive/Library/Preferences. You can press Command-Shift-G on your keyboard and type or paste /Library/Preferences into the resulting field. Hit the Enter key to go there directly.
For most you, this will be /Macintosh HD/Library/Preferences. If you changed the name of your startup drive, then the first part of the pathname above will be that name; for example, Casey/Library/Preferences.
You can also access this with /Library/Preferences, as the first slash implies the startup drive on a Macintosh.
You may notice the Library folder is part of the path; you may also have heard that the Library folder is hidden. That's true of the user Library folder, but the root drive's Library folder has never been hidden, so you can access it without performing any special incantations.
Once you have the /YourStartupDrive/Library/Preferences folder open in the Finder, scroll through the listings until you find the file called com.apple.Bluetooth.plist. This is your Bluetooth preference list and the file that has probably been causing the problems with your Bluetooth peripherals.
Select the com.apple.Bluetooth.plist file and drag it to the desktop. This will create a copy of the existing file on your desktop; we're doing this to ensure that we have a backup of the file we're about to delete.
In the Finder window that is open to the /YourStartupDrive/Library/Preferences folder, right-click the com.apple.Bluetooth.plist file and select Move to Trash from the pop-up menu.
You'll be asked for an administrator password to move the file to the trash. Enter the password and click OK.
Close any applications you have open.
Restart your Mac.
Pair Your Bluetooth Devices With Your Mac
Once your Mac restarts, a new Bluetooth preference file will be created. Because it's a new preference file, you'll need to pair your Bluetooth peripherals with your Mac again. In all likelihood, the Bluetooth assistant will start up on its own and walk you through the process. But if it doesn't, you can start the process manually by doing the following:
Make sure your Bluetooth peripheral has fresh batteries installed, and the device is turned on.
Launch System Preferences by either selecting System Preferences from the Apple menu, or by clicking on its Dock icon.
Your Bluetooth devices should be listed, with a Pair button next to each unpaired device. Click the Pair button to associate a device with your Mac.
What About the Backup of the com.apple.Bluetooth.plist File?
Use your Mac for a couple of days (or more). Once you're sure that your Bluetooth problem has been resolved, you can delete the backup copy of com.apple.Bluetooth.plist from your desktop.
Should the problems continue, you can restore the backup copy of com.apple.Bluetooth.plist by simply copying it from the desktop to the /YourStartupDrive/Library/Preferences folder.
Reset the Mac’s Bluetooth System
This last suggestion is a last-ditch effort to get the Bluetooth system working again. We don’t recommend using this option unless you've tried all the other options first. The reason for the hesitation is because it will cause your Mac to forget about all of the Bluetooth devices you have ever used, forcing you to reconfigure each and every one.
This is a two-step process that uses a slightly hidden feature of the Mac’s Bluetooth preference pane.
First, you need to enable the Bluetooth menu item. If you're not sure how to do this, see the Turn It Off and Back On section, above.
Now with the Bluetooth menu available, we'll start the reset process by first removing all devices from your Mac’s table of known Bluetooth devices.
Hold down the Shift and Option keys, and then click the Bluetooth menu item.
Once the menu is displayed, you can release the Shift and Option keys.
The drop-down menu will be different, now showing a few hidden items.
Select Debug, Remove all devices.
Now that the Bluetooth device table is cleared out, we can reset the Bluetooth system.
Hold down the Shift and Option keys once again, and click on the Bluetooth menu.
Select Debug, Reset the Bluetooth Module.
Your Mac’s Bluetooth system has now been reset to a condition similar to the first day you powered on your Mac.
What's Bluetooth?
Bluetooth is a wireless technology that makes short-range connections between devices (like your Mac, and a mouse or keyboard) at distances up to 10 meters (approximately 30 feet).
And with Bluetooth, your iPhone or iPad can create a 'Personal Hotspot' to provide Internet access for your Mac through your wireless service provider. Learn more about creating a Personal Hotspot with your iOS device.
Find out if your Mac has Bluetooth
Most Mac computers come with Bluetooth technology built-in. You can check to see if your computer supports Bluetooth:
Look for the Bluetooth icon in the menu bar. If the Bluetooth icon is present, your computer has Bluetooth.
Choose System Preferences from the Apple menu, then click Bluetooth. If the Bluetooth preferences lists options for enabling Bluetooth and making your device discoverable, Bluetooth is installed.
From theApplemenu, choose About this Mac, then click More Info. Select Bluetooth from the Hardware section. If the Hardware Setting section shows information, your system has Bluetooth installed.
About Bluetooth menu bar icons
The Bluetooth menu bar icon in the upper-right of your display gives you information about the status of Bluetooth and connected devices:
Bluetooth is on, but there are no devices connected to your Mac. If you expect a wireless device to be connected, make sure it's turned on.
Bluetooth is on and at least one wireless device is connected.
At least one wireless device has a low battery. Click the Bluetooth icon to identify the affected device, then replace its batteries.
Bluetooth is off. Click the Bluetooth icon using a wired mouse or trackpad or the built-in trackpad on your Mac notebook and select Turn Bluetooth On. Mac computers without built-in trackpads won’t allow Bluetooth to be turned off unless a USB mouse is connected.
Bluetooth is offline and unavailable. Restart your Mac. If the Bluetooth status doesn’t change, disconnect all USB devices and restart your Mac again. If Bluetooth continues to show as unavailable, you might need to get your Mac serviced.
Pair your Mac with a Bluetooth device
Bluetooth wireless devices are associated with your computer through a process called pairing. After you pair a device, your Mac automatically connects to it anytime it's in range.
If your Mac came with a wireless keyboard, mouse, or trackpad, they were pre-paired at the factory. Turn on the devices and your Mac should automatically connect to them when your computer starts up.
If you purchased your Apple wireless devices separately, learn how to pair them with your Mac.
If you want to remove (unpair) a Bluetooth device from your Mac's device list, follow these steps:
Choose Apple menu > System Preferences, then click Bluetooth.
Hover the pointer over the device you want to remove, then click the button that appears next to the device's name.
After you remove a Bluetooth device, you'll have to repeat the pairing process if you want to use it again.
Connect to Bluetooth devices after wake or startup
Bluetooth devices are usually available a few moments after your Mac completes its startup process. After waking from sleep, your Mac should find Apple wireless devices right away. Other wireless devices can take up to 5 seconds to be recognized. You might need to click a button on your wireless mouse to wake it up.
Some Bluetooth devices, such as audio headsets, might disconnect to conserve the device's battery power after no audio or data is present for a certain amount of time. When this happens, you might need to push a button on the device to make it active again. Check the documentation that came with your device for more information.
Wake your computer with Bluetooth devices
You can click your paired Bluetooth mouse or press a key on your paired Bluetooth keyboard to wake your Mac. You might need to press the space bar on the keyboard.
If clicking the mouse or pressing a key doesn't wake the computer, you might need to allow wireless devices to wake up your computer:
Choose Apple menu > System Preferences, then click Bluetooth.
Click Advanced.
Select the checkbox next to Allow Bluetooth Devices to wake this computer.
Connect multiple Bluetooth devices to one computer
The official Bluetooth specifications say seven is the maximum number of Bluetooth devices that can be connected to your Mac at once.
However, three to four devices is a practical limit, depending on the types of devices used. Some devices require more Bluetooth data, so they're more demanding than other devices.t perform reliably, try turning off devices you aren't using or unpair them from your Mac.
Fix interference from other household devices
Bt Client Mac
Bluetooth shares the 2.4 GHz ISM band with other household devices such as cordless telephones, wireless networks, baby monitors, and microwave ovens. If you see issues with your Bluetooth devices that you suspect might be due to frequency congestion, see AirPort and Bluetooth: Potential sources of wireless interference for further information.
Press startup keys on a Bluetooth keyboard
You can press keys immediately after startup to have your Mac perform functions like selecting a startup disk, using the recovery partition, or resetting NVRAM.