Not being a Mac user I can't comment on why the keyboard shortcut is not working for you.
One alternative to the keyboard shortcut for pasting without styles is this auto-enter calculation:
TextFormatRemove ( Self )
Be sure to also clear the "do not replace existing value" check box.
This cannot be used in situations where you want users to be able to style text inside the field, but works smoothly in cases where it can be used.
Thank you for the post.
Please see the related post here:
The shortcut to paste without style on a Mac in FileMaker Pro 12 and FileMaker Pro 12 Advanced is command-shift-option-v.TSFalconFileMaker, Inc.