DON'T DO THIS ON YOUR MAC:
For those who are still running into this problem, please try the following:
Open the Terminal app
Paste the command codesign -vvvv /Applications/Evernote.app
Please let me know if this fixes the problem, or if it reports anything not signed properly. If successful you'll see these last two lines
/Applications/Evernote.app: valid on disk
/Applications/Evernote.app: satisfies its Designated Requirement
IT BREAKS ALL YOUR CREDENTIALS AND CAUSES MORE PROBLEMS.