Remap Home and End key behaviour on a Mac

The following terminal script can be used to map Home and End keys on macOS so they work in the same way as they do in Windows and Linux: Home - beginning of the line, End - end of the line, Shift + Home - select text between cursor and beginning of the line, etc.

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.

Finding Apple Mail attachment edited and saved by MS Word

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.