READ MORE That check is for users who have upgraded to macOS Big Sur. If you're using Catalina or earlier, hold the Option key and click the battery icon in the menu bar to reveal the battery status menu. Along with Apple sorting this MacBook glitch, there's more good news on the horizon for owners of these popular machines. Apple has confirmed that the latest Big Sur 11.3 release is now in the beta phase which means anyone who is signed up to Apple's developer testing programme can download it and give it a try. A full release should arrive in the coming weeks and one of the biggest changes aims to make the Safari browsing experience better.