MacBook Pro capitalising the word "and".

Hello NeilMahony,

Thanks for posting in the Apple Support Communities. We're happy to look into this with you.

• To help us determine the best solution for this, would you please confirm what apps this happens in?
• What's the macOS version you're currently using? You can locate this information by clicking the Apple Menu () in the top left corner and selecting About this Mac.
• Have you checked to see if there's been a Text Replacement set up for this particular word? If not, this is a good step to take and help troubleshoot the issue. Replace text and punctuation in documents on Mac - Apple Support

Once we have more details, we'll be happy to continue researching possible solutions.

Best regards.

What happens if you type "Stu and me" or "Stu and I," (depending on the context of the sentence)? If you have a grammar-checker installed, "myself and Stu" would likely trigger its ire on two counts.

Hey NeilMahony,

Thanks for getting back to us, it’s appreciated. Since it seems to be only happening with Apple apps, please contact Apple Support directly: Get Support

Take care!