External trackpad not scrolling when connected to MacBook Air

"External track pad not scrolling: I've just bought an external trackpad to go with my MacBook Air and studio monitor but am disappointed: it doesn't scroll and I have to "hard tap" to get it to do things (unlike the trackpad on my MacBook Air). I am a big fan of Apple but get very frustrated when their products do not behave in the intuitive way in which one would expect them too. Difficult to find answers online. All help appreciated - otherwise, I'm asking for a refund...!"

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External Trackpad not Working:

A. Boot in Safe Mode:

Boot your Mac in Safe Mode for 30 seconds, and the restart your Mac. See if it then works. Go here: Start Up your Mac in Safe Mode - Apple Support

B. Verify the Connection:

First off, see if the headphones are is even seen: 

1. Hold Down: the Option key
2. Click: the Apple menu
3. Choose: System Information or System Report
4. Select: Bluetooth or USB from the list on the left
5. Look For: the trackpad

C. Confirm Compatibility:

Look on the original packaging, or on the manufacturer's Website, and confirm that this is compatible with your device. If so, you may need to install the lasts drivers for it. Get the driver from none other than the Manchfacuter, as a way to avoid scams and such.

D. Restart the Mac:

Having just installed this, reform a restart.

"Thanks for your reply but surely the whole point about buying an *Apple* track pad is that it's compatible with my *Apple* laptop. It connects OK but it's just not scrolling. It's very strange..."

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Trackpads Not Working After Plugging In:

If it is not working, then it probably needs to be configured to do so. So, restart your Mac. And if a restored does no fix this, Boot your Mac in Safe Mode for 30 seconds, and the restart your Mac. See if it then works. Go here: Start Up your Mac in Safe Mode - Apple Support