So, you can try to boot your Mac in Safe Mode. Safe Mode prevents your Mac from loading specific software as it boots, including the system extensions not required by macOS. The next section elaborates the right method to fix the kernel extension issue that prevents your Mac from booting after updating to macOS Big Sur 11. And the apps that rely on KEXTs, may not work and would result in a non-booting Mac. Apple has deprecated Kernel Extensions (KEXTs) and introduced System Extensions (SEXTs) in their recent macOS. Non-booting of Mac due to kernel extensions in macOS Big Sur is an expected issue. Could anyone suggest how to fix such non-booting issues on my Mac? Thanks in advance.” The trouble is that an app whose kext was loaded isn’t installed on my system, and another app, which was installed previously, was uninstalled a few months back. After verifying the log report, I’ve found that kexts are loaded. On starting my Mac, macOS fails to boot several times and then boots after disabling third-party kernel extensions. But, the update resulted in a booting issue. “Recently, I updated my Mac from macOS Catalina to Big Sur.
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