I am just learning how to upload files to PSE2018 (yes, very beginner!). I use a PC but I noticed that when I uploaded a file it had an extra file with it called MACOS. I read that it was something to do with being created originally in a MAC. My question is: can I safely delete this file to save space or is it important? Sorry if this is obvious but my brain knows nothing at the moment!! 
MACOS file in PSE2018
Tue, 01/14/2020 - 23:51
#1
MACOS file in PSE2018
I'm pretty sure that file can be deleted. I use a Chromebook and I will admit, I've never even looked in that folder. A Chromebook can't open that file and I've never had a problem opening files that contain that folder. My Chromebook just gives me a message saying unsupported file type.
Yes it can be deleted. I use a PC, so I delete them all of the time. As you stated they are created on a MAC.
I suspect they're some sort of Mac housekeeping file and aren't even really crucial if someone wants to use the original files on a Mac. I've deleted the MACOS files in any kit I download (PC user).
I always delete those, and I have for over 13 years!