Hi, recently I purchased a new Imac and updated as I took from the delivery box to Big Sur. Uploaded my Lightroom (which is also installed on my old laptop with Windows) The app loaded up no problem, then I started to add in my purchased presets along with Topaz Denoise. All seemed ok. However when I go to save my files after editing (RAW files from camera) and yes I can do what ever changes I want to the image in Lightroom, but when I go to export thre imagea window comes up saying file cannot be written saying the IMG_06211.CR2 along with a small icon of Topaz. I have removed all apps from Topaz, removed Lightroom and reinstalled and its still doing the same thing. I did not reinstall Topaz. Can anyone point me in the right direction please. Very dissappointed as now having to work back on the laptop to do editing in Lightroom and this Imac was not cheap!!!