It stores your Mac's preferences such as date, time, desktop, mouse, and so on. NVRAM is short for Non-Volatile Random Access Memory. If there are no issues with Apple's servers, try the next step.
(Green means available, while red or yellow means issues with Apple's servers, and there is nothing you can do but wait.
Find the macOS Software Update and see its status. What you need to do is go to Apple's System Status page to check if there is a problem with Apple's servers. Update problems occur when Apple's servers are experiencing issues. Check If There Are Issues with Apple's Servers In this case, you can press and hold the Power button, turn off your Mac, and then restart your Mac to see if the update is successful. If your Mac is stuck on a screen for over 10 minutes, most likely, your update has failed. Related Article: Mac Won't Connect to Wi-Fi? Here's the Fix 4. Check if you can update your Mac properly. Click the Wi-Fi icon in the status menu. To have a better Wi-Fi connection, follow the steps below to reset your Wi-Fi. Therefore, make sure your Wi-Fi is connected and stable. The macOS installer needs to get the relevant Mac information over the network. Network connection plays an essential role in a successful macOS update. It only takes a few seconds to free up gigabytes of storage space.Īlternatively, you can refer to How to Free Up Disk Space on Mac for more detailed Mac cleaning tips. What the tool can do for you includes junk file cleaning, unwanted app removal, and large/duplicate file detection and deletion. 
If you're running low on storage space, use BuhoCleaner, one of the best Mac cleaners, to quickly clear unnecessary files from your Mac. To know how much free space you have left, click the Apple menu > About This Mac > Storage. As a rule of thumb, you'd better keep at least 24 GB of free space. You'll also need some extra space to install it successfully. That doesn't mean you only need 12 GB of free space. The installer package for macOS Ventura is about 12 GB. Insufficient storage space is one of the most critical factors that you can't update Mac. If your System Preferences do not include Software Update, then you are using macOS 10.13 or older, and you will need to use the App Store to update.Software Update will only show upgrades that are compatible with your Mac.
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