Have been having issues with JPG QuickLook Finder previews since I got this laptop early this year (Macbook Pro 2017 15" 2.9 GHz currently on 10.13.4). Updated the OS several times from the version that came stock without any results. Was able to drastically reduce .CR2 preview load times with the Raw Right Now app but haven't come across any similar plugins for JPGs. Can anyone comment on their experience on the new operating system (Mojave) for JPG QuickLook Finder previews? Has load time decreased? Alternatively, are there any plugins that may improve my current experience without updating?