Photo screensaver hangs up computer
This was working well until a couple of days ago. For a screensaver, I like to have a slideshow of my photos. Now the entire computer hangs up when I attempt to select the folder containing the photos. In fact, the folder selection window stops
The computer stays hung up for about 55 seconds, then it hangs up again when I click on a folder. After several attempts, I am able to select a folder, but after running awhile the slideshow changes to landscapes.
This is vexing me, and I will appreciate help.
iMac 27″, 10.14