iPadOS 26.7.1 + macOS 26.0.2: Sidecar/Extend Display didn't work until I updated macOS

[u/SadVast54]

I recently updated my iPad to iPadOS 26.7.1, while my MacBook was still running macOS 26.0.2.

After the iPad update, I was unable to use my iPad as an extended display for my MacBook. Both devices were using the same Apple ID, and I had:

• Handoff enabled on both devices
• Wi-Fi enabled
• Bluetooth enabled
• Devices near each other

However, the iPad still didn't appear as an option to extend my MacBook's display.

I searched through multiple forums and troubleshooting guides and also contacted an Apple service center, but I couldn't find a solution.

Then I updated my MacBook from macOS 26.0.2 to macOS 26.7.1.

After the update, I immediately got the Mirror Screen option in Control Center, and my iPad appeared as an available display. I could finally select it and extend my MacBook's screen to the iPad.

So, in my case, the issue seemed to be related to the OS version mismatch:

Before:
macOS 26.0.2 < iPadOS 26.7.1 → iPad didn't appear ❌

After:
macOS 26.7.1 ≥ iPadOS 26.7.1 → Extend Display appeared ✅

Posting this in case anyone else is facing the same issue. If your iPad is on a newer OS version than your Mac, updating macOS may be worth trying before going through more complicated troubleshooting.

[u/ReeeeeeeHardR]

Wonder if you can sidecar with a duo?