Hello , After upgrading to Big Sur a number of screensavers work erratically: For example MOSAIC which in preview works and when it is launched remains frozen ...... SLIDING PLAN ditto it seems that it is Screen saver coming from ILIFE ..... the console says: Nov 16 09:30:29 iMac iLifeSlideshows [631]: getattrlist failed for /Library/GPUBundles/AppleIntelSKLGraphicsVADriver.bundle/Contents/MacOS/AppleIntelSKLGraphicsVADriver: 2: No such file or directory Nov 16 09:30:29 iMac iLifeSlideshows [631]: getattrlist failed for /Library/GPUBundles/AppleIntelSKLGraphicsVAME.bundle/Contents/MacOS/AppleIntelSKLGraphicsVAME: 2: No such file or directory Nov 16 09:30:29 iMac iLifeSlideshows [631]: getattrlist failed for /Library/GPUBundles/AMDRadeonX4000GLDriver.bundle/Contents/MacOS/ATIRadeonX4000SCLib.dylib: 2: No such file or directory Nov 16 09:30:29 iMac iLifeSlideshows [631]: getattrlist failed for /System/Library/Extensions/AMDRadeonX4000GLDriver.bundle/Contents/MacOS/ATIRadeonX4000SCLib.dylib: 2: No such file or directory Nov 16 09:30:29 iMac iLifeSlideshows [631]: getattrlist failed for /System/Library/Frameworks/OpenGL.framework/Resources//GLRendererFloat.bundle/GLRendererFloat: 2: No such file or directory Nov 16 09:30:45 iMac com.apple.xpc.launchd [1] (com.apple.ScreenSaver.iLife-Slideshow-Extension [631]): Service exited due to SIGKILL | sent by iLifeSlideshows [631] If you tag Show Time in Screen Saver it seems works properly..... Any one have a Idea?? in advance many Thanks!!