Your Mac failed to boot into Recovery Mode usually happens without notice. Possible Reasons of Mac Won't Boot into Recovery Mode But before checking the solutions, it's better for you to understand the possible reasons why Mac Command R is not working.
If you have encountered the same problem, then you will need this article. Users might have trouble booting their Mac into Recovery Mode. Pressing Command + R, you can boot into Recovery Mode to repair the startup disk, reinstall macOS, or prevent the Mac from starting up normally. Mac Recovery Mode is designed for users to self-troubleshooting various problems.