DisplayLink Manager - Black screen instead of videos

Issue

MacBook Pro running 2 external screens via DisplayLink Manager enabled USB dock doesn't play videos in web browsers (Chrome and Edge). The sound is played normally, but videos only display a black screen.

Apple photos displays exclamation mark instead on HEIC images

Issue

MacBook Air with macOS 10.11 (El Capitan) Apple photos app displays preview thumbnails for all photos, but some photos do not open in full view when double-clicked. Instead of a photo, a grey exclamation mark is displayed. On a closer look it became clear that only HEIC format files were affected, JPGs were opening just fine.

Apple photos exclamation mark

Finding Apple Mail attachment edited and saved by MS Word

MS Word for Mac

Issue

A user attached a Word document to an Apple Mail email from his desktop, then opened it from Apple Mail with MS Word, made multiple changes and saved it by clicking File > Save. He then closed the document and was surprised to find that the changes he made were not present in the attached document, nor in the original file saved on the desktop.

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