Q: How to import Notes (Notes application) from one Mac to another. PDF export file is not recognized.

I've been using Stickies extensively in the past and, having purchased a new MacBook Pro, read on how to transfer Stickies files. The indications were that I now need to use the Notes application rather than Stickies. So I cut & past all my many Stickies notes into Notes & exported them as a PDF (according to Apple Support instructions). However, the Notes app. on my MacBook does not recognize the PDF file (it's grayed out). Any solutions?

Thanks.