Downloads won't open unless renamed
This is an odd one. When I download a file in Safari, I'm told:
The file "X" couldn't be opened because you don't have permission to view it. To view or change permissions, select the item in the Finder and choose File > Get info
As far as I know, I haven't changed settings and I'm the only user. Oddly, if I go into the Downloads folder, find the file and change the filename, I can open it. Any ideas?
MacBook Pro 13″, macOS 10.12