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Error "Unable to Connect to iPad Pro. A miscellanious error occurred (-6745)"

I'm using my iPod Pro as a second display for my iMac. After updating to macOS Sequoia (iMac) and iOS 18.0 (iPad) I'm getting an error message when I try to connect via USB cable (connecting via WiFi works): "Unable to Connect to iPad Pro. A miscellanious error occurred (-6745)" and the iPad Pro immediately locks its screen. As it has worked with macOS Sonoma, I wonder what to do. I tried every trick I could found, but to no avail.

Update: Have a look at your Firewall settings (Network / Firewall / Options) and allow incoming connections from SidecarRelay. This solved the issue.

[Re-Titled by Moderator]

iMac 27″, macOS 15.2

Posted on Jan 18, 2025 12:52 AM

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Error "Unable to Connect to iPad Pro. A miscellanious error occurred (-6745)"

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