If the error is caused by a third-party extension or launch agent, starting in safe mode will allow you to run the update. It performs checks on your boot disk and repairs problems, clears out temporary files, and prevents all extensions other than those needed for carrying out basic tasks from loading. Boot your Mac in Safe Modeīooting your Mac in safe mode does a number of things. The only way to find out which one is to plug them in one by one and wait for the error message to appear again. If you don’t see the error message again and the update installs successfully, you know it was a peripheral that caused the error. Disconnect all peripherals and restart your Mac. Force your Mac to shut down by pressing and holding the power button until it does. However, it’s very easy to check, so it’s worth doing to eliminate it. It’s unlikely that peripherals connected to your Mac are causing the problem. That leaves your Mac or peripherals connected to it or third-party software installed on it as the cause. If you’re connected to the correct Wi-Fi network or by Ethernet, and your router and broadband connection are working, we can rule them out as possible causes. Keep it in your applications folder, and you’ll have it next time you need to fix a problem. Its Maintenance module has a number of tools that carry out tasks like freeing up RAM, reindexing Spotlight, and repairing disk permissions. CleanMyMac X can do both of those things. It’s even more useful if that tool can also carry out preventive maintenance to stop problems from occurring in the first place. So, it’s very useful to have a tool that can troubleshoot problems and fix them when they happen. And it can be difficult to know how to deal with each one when they appear. The ‘critical software update is required for your Mac’ error is only one of many that can occur on your Mac. If that doesn’t work, check your provider’s broadband service and contact them if necessary. ![]() Does it connect to the internet? Is it getting good download speeds? If not, restart your router. Try another device connected to the same router. The problem could be that your router isn’t working properly. ![]() In the same window as the list of Wi-Fi networks, there will be an option for ‘Other Network Options.’ If your Mac has an Ethernet socket and you can connect an Ethernet cable from your Mac to your router, choose that option, then connect the cable and choose Ethernet. Make sure you choose the correct Wi-Fi network and that it connects successfully. When you see the error message, you may also be shown a list of Wi-Fi networks. ![]() How to fix it when you see the error message ‘a critical software update is required for your Mac’ 1. It’s a real macOS error message that is caused by the inability to download and install a critical update. ![]() It can’t do anything without installing the update, and it can’t install the update.
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