Multiple AppleIDs on one iPad

You can use an iPad as a second monitor for either of your MacBooks, but there are some limitations based on the Apple IDs.

Using Sidecar:

• Sidecar Requirement: Sidecar requires both the MacBook and the iPad to be signed in with the same Apple ID. This means you can’t use Sidecar natively with both your personal and work MacBooks if they are tied to different Apple IDs.

• Switching Apple IDs: While you can switch Apple IDs on the iPad, it’s not a very practical solution because it requires signing out of one Apple ID and into another each time, which can be cumbersome and may lead to issues like app access restrictions or the need to re-download content.

Alternatives to Sidecar:

If you want a more seamless solution, consider the following alternatives:

1. Third-Party Apps:

• Luna Display or Duet Display: These apps allow you to use your iPad as a second monitor without requiring the same Apple ID on both devices. They work over Wi-Fi or with a USB cable and are more flexible in terms of compatibility with different Apple IDs.

2. Universal Control (If both Macs and the iPad are on macOS Monterey or later):

• Universal Control allows you to use one mouse and keyboard across multiple Apple devices without needing the same Apple ID. However, this doesn’t turn your iPad into a monitor, but it does allow for easier multitasking across devices.

Recommendation:

If you want the flexibility to use the iPad as a second monitor for both your personal and work MacBooks without the hassle of switching Apple IDs, I recommend looking into a third-party app like Luna Display or Duet Display. These solutions will give you the most versatility without being tied to Apple ID restrictions.

Outside of Educational and Enterprise establishments, iPad and iPhone are principally intended to be a single-user device - and are not intended to shared in the same manner as you may be accustomed when using a Windows PC or Mac computer - which has multiple user profiles/accounts.

For managed environments, where multi-user usage is possible, the Deployment Guide provides appropriate guidance.

Shared iPad overview – Apple Support

For unmanaged environments, be aware that if you sign-out of iCloud and other Apple services - and sign-in with a different AppleID - you’ll not be able to change back for 90-days. So as to prevent account abuse, some critical Apple services will only allow one change of signed-in AppleID (on a device) in a 90-day period.

In conclusion, unless you fully understand and accept the implications, you would be well advised to reconsider any attempt to regularly switch between AppleID accounts.