Hi, So what I've been wanting to ask for a number of weeks and months is this; when in System Preferences and the Desktop & Screensaver portion of same - Is this also so painfully slow that browsing and adding wallpapers is a minute long process at times? For instance I have a series of wallpapers divided into folders that I want to have listed in the sidebar. That's all good and everything, but even having this folder show up and browsing for the desired wallpaper is soooo slow. I can record a video if you want eyes on it. I use a homemade Fusion drive using an external 250 GB SSD from WesternDigital and I then use the 1TB 7200rpm hard disk drive internally inside my late 2015 27" iMac The issue is there from the beginning with macOS Mojave and not yet resolved with latest public beta 3 of 10.14.6 released not many days ago. I have been on non-beta for the longest time and I thought that eventually the slowness of mentioned System Preferences section would be fixed. Neither the SSD or HDD is failing although the HDD shows some signs of usage via DriveDx. But not failing. Also, the splitting up the Fusion drive doesn't do anything to help the issue. I have been on a regular macOS installation on the same SSD for many months. All APFS drives. Having the internal 1TB hard disk drive on HFS+ doesn't matter and the slowness of the particular System Preferences pane is the same as with my current setup. Hints and tips?