How long to press down the two keys and when to release them are crucial for entering macOS Recovery. Check if you use Command + R keys properly
![mac recovery key combinations mac recovery key combinations](https://iboysoft.com/images/resource/terminal-in-recovery-mode.png)
And for macOS Sierra launched in 2016 or earlier, it doesn't offer all options in Recovery Mode.
#MAC RECOVERY KEY COMBINATIONS MAC OS X#
Note: If your Mac runs Mac OS X 10.6 Snow Leopard or older, there's no recovery partition available.
![mac recovery key combinations mac recovery key combinations](https://support.apple.com/library/content/dam/edam/applecare/images/en_US/macos/Big-Sur/macos-big-sur-system-prefs-security-filevault-master-key-enable.png)
And consequently, fix the Mac Recovery Mode not working issue. You can troubleshoot the malfunctioning Command R with the following solutions. Any of these can bring about the Command R not working even on macOS Big Sur and Monterey. For example, your inappropriate way of using Command R keys, faulty keyboard, Mac corruption, OS bug, etc. The reasons for Command R on Mac not working are various. Reset Mac or reinstall macOS without Command R
![mac recovery key combinations mac recovery key combinations](https://media.idownloadblog.com/wp-content/uploads/2016/02/macbook-pro-keyboard-angled-photograph.jpg)
Unexpectedly, your Mac fails to boot in Mac Recovery Mode but starts up normally or shows a blank or black screen. You press the Command-R shortcut keys during Mac startup, trying to enter the built-in Recovery Mode to reinstall macOS or reset your Mac.