Mac Computers

When you attach an unknown accessory (USB or Thunderbolt) to a Mac laptop, the default configuration asks you to allow new accessories. (When you attach an unknown accessory (USB or Thunderbolt) to a locked Mac, you are prompted to unlock the Mac.)

To enable/disable these settings you must go to:

System Setting > Security & Privacy > Security

1.System Settings

 2.Security & Privacy

3.Security
 

4.Scroll down until you see the "Allow accessories to connect" drop down and choose one of the following:

• Ask every time
• Ask for new accessories
• Automatically when unlocked
• Always

Approved accessories can be connected to a locked Mac for up to 3 days from when the Mac was last locked.

• Any accessory attached after 3 days prompts you to “Unlock to use accessories.”

iPhone and iPad

When you attach an unknown accessory (USB or Thunderbolt) to a iPhone or iPad, the default configuration asks you to allow new accessories. 

Users can clear pairing trust relationships by going to 

Settings > General > Reset > Reset Location & Privacy

1.Settings
 

2.General

3.Reset

4.Reset Location & Privacy

5.Enter Passcode

6.Confirm Reset

or

by erasing their device.

Additionally, these trust records are removed if they’re unused for 30 days.