MacOs Ventura issues with External Dell Display over thunderbolt

Blurry and confusing lines when Dell External monitor is connected with MacBookPro 2018 (MacOS Ventura) through thunderbolt (USB-C). Only resolution is to kill WindowServer process but this has to be done every time when MBP starts or boots. My Dell Monitor is U4021QW. It was working all fine before upgrading to MacOs Ventura.

Posted on Feb 20, 2023 01:54 AM

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1 reply

Jaym_8

Community Specialist

Feb 21, 2023 12:25 PM in response to astprince

Hello astprince,

If an external monitor is not working properly, you can try these basic steps: If your external display is dark or low resolution

If it's still not working properly, you'll want to contact Apple for assistance: Get Support

Cheers!

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MacOs Ventura issues with External Dell Display over thunderbolt

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