Don't waste your money. My Mac meets the system requorements, yet the app will not open.

Thank you for being the only 2FA authenticator app which is compatible with MacOSX 10.13 High Sierra in the app store that will work on my macbook. All of the other 2FA authenticator apps require at least 10.14 or 10.15 or 11 or 12. If you still use an older mac, this is the only app that I could find in the app store that works if you are still on 10.13. So, thanks so much!Addendum: iCloud is definitely required for this app. If you disable iCloud for this app, your 2FA codes will not be saved. How this app works is your codes are saved to the iCloud and when you reboot your mac, then this app will reload your 2FA codes from the iCloud. If iCloud is disabled for this app, they won’t be saved and and the app list of 2FA codes will be EMPTY. If you do NOT want to use any cloud to save your passwords or 2FA codes, then this app will not work for you. Too bad if you want to keep your 2FA codes on your macbook and not save to the clouds. GREAT APP otherwise if you trust Apple encryption which most iPhone users do. And, YES, the you access the app from the menu bar at the top of the mac screen — it does not open up with a panel like with a regular app.