Apple’s two features that turn an iPad into an extension of your Mac have a long list of requirements.
Trying to use your iPad with a Mac to extend or mirror the Mac’s display with Sidecar or share a keyboard and mouse with Universal Control and having no luck? Apple has a number of requirements for each feature that have to be met. Run through these checklists to see if you’re missing one.
General requirements
Both features require:
- Same Apple ID: The iPad and Mac have to be signed into the same Apple ID account.
- Two-factor authentication: Perhaps for extra privacy protection, Apple requires that the Apple ID account has two-factor authentication enabled.
- Awake and unlocked: Both devices must be ready for use.
- Mac models: Most Mac models released in 2016 or later qualify for both features. (See the complete list here.)
- iPad models: Apple allows both features with any iPad Pro as well as the 6th generation or later iPad, 5th generation or later iPad mini, and 3rd generation or later iPad Air.
Read more at MacWorld.com