The new Evernote (I guess it is version 10, I have 10.4.4 atm) also works horribly for me. I really love the app but I'm seriously considering switching to something else because it is so laggy now. It requires so much CPU power now that it is no longer easy to use. "Evernote Helper (Renderer)" also constantly runs in the background when the app is open (that I can see in Activity Monitor—on a Mac) and takes up 30-100+% of my CPU power, even when I'm doing something else with the app in the background! I have a 2015 duo-core Mac Air, but still, how can a 6 year old computer not run an app as simple as Evernote! I know this is not the place really, but the app on IOS has the exact same problem—in that case I have an iPhone 12 and still it is laggy. I really don't understand what the developers have been thinking with making an app that is so easy to use suddenly SO memory heavy on both iOS and OSX. I am going to switch to something else if this is not resolved, even though I have over 2,500 notes and use it all day essentially.