How do I go about selecting photos from Photos OSX for Facebook?

I

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Selecting photos from Photos OSX for Facebook

Hi,
Since moving to Photos OS X from iPhoto it can take several days before a new photo shows up in the Facebook photos picker.
You select Add Photo or video in Facebook & in the drop down window select the Photos OS X library. Scroll down to the bottom & no sign of the more recent photos.
Running all the latest versions of OS & apps.