Sandisk UltraPlus memory card not recognized on late 2015 iMac

I have a 27 inch iMac late 2015 model. It doesn't recognise my recently purchased Sandisk UltraPlus memory card. I have older Sandisk cards which work perfectly well

[Re-Titled by Moderator]

Original Title: Sandisk compatibility

iMac 27″, macOS 12.7

Posted on Sep 26, 2025 10:04 AM

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Sandisk UltraPlus memory card not recognized on late 2015 iMac

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