Apple’s 2021 iMac will not only sport a bold new look but will also have a lot more screen real estate, according to a leaker with a strong track record. “The iMac’s screen is really. Apple offers what they call 'updates' as part of Software Update. Updates are small changes and fixes, and are not expected to cause problems for apps. What Apple calls 'upgrades' are larger and potentially more disruptive changes, and some upgrades can or will require app changes or updates. I can't update to Big Sur because my iMac is late 2013. After updating to Catalina 10.15.7 I have a lot of apps that won't work. They say to update them in the app store but app store says it has to be 11.0. I can't uses pages, numbers, word, keynote. After I updated to Catalina my apps won't work, like pages, numbers, keynote and HP apps.
If you're having difficulty finding or installing updates:
Periodically, Apple releases updates to your macOS software (which can include updates to apps that come with your Mac and important security updates). If you receive a notification that software updates are available, you can choose when to install the updates, or choose to be reminded the next day.