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Why is my Mac mini showing purple and green colors?

When linking my new Mac M4 mini to my viewsonic monitor I get a dark purple and lime green display. Have tried various adjustments as suggested online and have spoken to Apple helpline, but without solving the problem. I saw a post here with exactly the same issue but from 2022, but no suggestions seem to have resolved the issue. The monitor and HDMI cable work fine with my Windows 10 pc. Has anyone else experienced this problem?

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Mac mini, macOS 15.2

Posted on Jan 8, 2025 5:46 AM

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Level 10

93,676 points

Posted on Jan 8, 2025 8:37 AM

The new Mac mini's do not play well with long cheap HDMI cables.

Test a short 3.3ft high speed HDMI cable between the Mac mini and the monitor.

for a couple of examples:

https://www.amazon.com/8K-HDMI-Cable-Highwings-Braided/dp/B08NX5CZTF/ref=sr_1_1_sspa?

https://www.amazon.com/48Gbps-Snowkids-Braided-Compatible-Blu-ray/dp/B09HXPZ1PQ/ref=sr_1_6?

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Top-ranking reply

Level 10

93,676 points

Jan 8, 2025 8:37 AM in response to ConnelD

The new Mac mini's do not play well with long cheap HDMI cables.

Test a short 3.3ft high speed HDMI cable between the Mac mini and the monitor.

for a couple of examples:

https://www.amazon.com/8K-HDMI-Cable-Highwings-Braided/dp/B08NX5CZTF/ref=sr_1_1_sspa?

https://www.amazon.com/48Gbps-Snowkids-Braided-Compatible-Blu-ray/dp/B09HXPZ1PQ/ref=sr_1_6?

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Why is my Mac mini showing purple and green colors?

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