Mouse double clicking no working
Hi all, I have an iMac (10 YO) running High Sierra and suddenly double clicking with my mouse doesn’t open a file or a folder. To do that I have to right click and select “open” from the pop up window. I have done anything that I know such as restart, PRAM, trying another mouse, etc, nothing work. Any idea? Thanks in advance for any advice!
iMac 27″, macOS 10.15