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4

2

Our team administrates several Macs. To save costs (flights, etc.) in events where we have to remotely restore a system at our client location, we are trying to understand how to enter recovery mode without being physically present at the keyboard to enter recovery mode by pressing Cmd + R.

Can I pass a flag to sudo reboot or something similar, to initiate a reboot into recovery mode?

(All of the internet searches I've done have turned up "Press this series of keys on the keyboard" to enter various flavors of recovery.)

macos keyboard imac recovery

share|improve this question

asked Aug 16 at 13:03

user3.1415927user3.1415927

26322 silver badges99 bronze badges

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  Even if you could issue a command to restart to the Recovery HD, what are you going to do next, you'll not have any connectivity to proceed further.
  
  – user3439894
  Aug 16 at 13:12
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Networking isn't up by default? I'll have a hardwired connection...
  
  – user3.1415927
  Aug 16 at 13:14
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Networking is up but how do you intend to retake control?
  
  – user3439894
  Aug 16 at 13:16
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Honestly I had hoped to use vnc or ssh. Are those services not available?
  
  – user3.1415927
  Aug 16 at 13:17
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Coming from the world of pxe-boot installs and unattend.xml for Windows installations, I was hoping for something similar.
  
  – user3.1415927
  Aug 16 at 13:18
  

  
  
  
  

 | 
show 3 more comments

4

2

Our team administrates several Macs. To save costs (flights, etc.) in events where we have to remotely restore a system at our client location, we are trying to understand how to enter recovery mode without being physically present at the keyboard to enter recovery mode by pressing Cmd + R.

Can I pass a flag to sudo reboot or something similar, to initiate a reboot into recovery mode?

(All of the internet searches I've done have turned up "Press this series of keys on the keyboard" to enter various flavors of recovery.)

macos keyboard imac recovery

share|improve this question

asked Aug 16 at 13:03

user3.1415927user3.1415927

26322 silver badges99 bronze badges

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  Even if you could issue a command to restart to the Recovery HD, what are you going to do next, you'll not have any connectivity to proceed further.
  
  – user3439894
  Aug 16 at 13:12
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Networking isn't up by default? I'll have a hardwired connection...
  
  – user3.1415927
  Aug 16 at 13:14
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Networking is up but how do you intend to retake control?
  
  – user3439894
  Aug 16 at 13:16
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Honestly I had hoped to use vnc or ssh. Are those services not available?
  
  – user3.1415927
  Aug 16 at 13:17
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Coming from the world of pxe-boot installs and unattend.xml for Windows installations, I was hoping for something similar.
  
  – user3.1415927
  Aug 16 at 13:18
  

  
  
  
  

 | 
show 3 more comments

Our team administrates several Macs. To save costs (flights, etc.) in events where we have to remotely restore a system at our client location, we are trying to understand how to enter recovery mode without being physically present at the keyboard to enter recovery mode by pressing Cmd + R.

Can I pass a flag to sudo reboot or something similar, to initiate a reboot into recovery mode?

(All of the internet searches I've done have turned up "Press this series of keys on the keyboard" to enter various flavors of recovery.)

macos keyboard imac recovery

share|improve this question

asked Aug 16 at 13:03

user3.1415927user3.1415927

26322 silver badges99 bronze badges

share|improve this question

asked Aug 16 at 13:03

user3.1415927user3.1415927

26322 silver badges99 bronze badges

share|improve this question

asked Aug 16 at 13:03

user3.1415927user3.1415927

26322 silver badges99 bronze badges

asked Aug 16 at 13:03

user3.1415927user3.1415927

26322 silver badges99 bronze badges

asked Aug 16 at 13:03

user3.1415927user3.1415927

26322 silver badges99 bronze badges

1 Answer
1

active

oldest

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6

You can set NVRAM options from command line to boot into recovery:

sudo nvram "recovery-boot-mode=unused"

sudo reboot

This will put your system into recovery mode.

NVRAM (nonvolatile random-access memory) is a small amount of memory that holds certain settings and can be accessed at boot by the Mac's firmware.

share|improve this answer

answered Aug 16 at 13:43

VolskVolsk

2,0641010 silver badges1717 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Great info, thanks - where would I have found this if I were searching the docs on my own? (Teach a man to fish ....)
  
  – user3.1415927
  Aug 16 at 13:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  (And I'll test this once I'm in front of a mac that I can reset "remotely" (from the next desk over) and locally observe the results.)
  
  – user3.1415927
  Aug 16 at 13:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @user3.1415927, Those commands will take you to a screen like this one which then on a standard install of macOS you'll not have any remote control over. Also, trying to ssh returned ssh: connect to host nnn.nnn.n.n port 22: Connection refused. You'll need to use third-party software as suggested in the comment by SamAndrew81.
  
  – user3439894
  Aug 16 at 14:17
  
  
  

  
  
  
  

add a comment | 

6

You can set NVRAM options from command line to boot into recovery:

sudo nvram "recovery-boot-mode=unused"

sudo reboot

This will put your system into recovery mode.

NVRAM (nonvolatile random-access memory) is a small amount of memory that holds certain settings and can be accessed at boot by the Mac's firmware.

share|improve this answer

answered Aug 16 at 13:43

VolskVolsk

2,0641010 silver badges1717 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Great info, thanks - where would I have found this if I were searching the docs on my own? (Teach a man to fish ....)
  
  – user3.1415927
  Aug 16 at 13:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  (And I'll test this once I'm in front of a mac that I can reset "remotely" (from the next desk over) and locally observe the results.)
  
  – user3.1415927
  Aug 16 at 13:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @user3.1415927, Those commands will take you to a screen like this one which then on a standard install of macOS you'll not have any remote control over. Also, trying to ssh returned ssh: connect to host nnn.nnn.n.n port 22: Connection refused. You'll need to use third-party software as suggested in the comment by SamAndrew81.
  
  – user3439894
  Aug 16 at 14:17
  
  
  

  
  
  
  

add a comment | 

6

You can set NVRAM options from command line to boot into recovery:

sudo nvram "recovery-boot-mode=unused"

sudo reboot

This will put your system into recovery mode.

NVRAM (nonvolatile random-access memory) is a small amount of memory that holds certain settings and can be accessed at boot by the Mac's firmware.

share|improve this answer

answered Aug 16 at 13:43

VolskVolsk

2,0641010 silver badges1717 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Great info, thanks - where would I have found this if I were searching the docs on my own? (Teach a man to fish ....)
  
  – user3.1415927
  Aug 16 at 13:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  (And I'll test this once I'm in front of a mac that I can reset "remotely" (from the next desk over) and locally observe the results.)
  
  – user3.1415927
  Aug 16 at 13:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @user3.1415927, Those commands will take you to a screen like this one which then on a standard install of macOS you'll not have any remote control over. Also, trying to ssh returned ssh: connect to host nnn.nnn.n.n port 22: Connection refused. You'll need to use third-party software as suggested in the comment by SamAndrew81.
  
  – user3439894
  Aug 16 at 14:17
  
  
  

  
  
  
  

add a comment | 

You can set NVRAM options from command line to boot into recovery:

sudo nvram "recovery-boot-mode=unused"

sudo reboot

This will put your system into recovery mode.

NVRAM (nonvolatile random-access memory) is a small amount of memory that holds certain settings and can be accessed at boot by the Mac's firmware.

share|improve this answer

answered Aug 16 at 13:43

VolskVolsk

2,0641010 silver badges1717 bronze badges

sudo nvram "recovery-boot-mode=unused"

sudo reboot

share|improve this answer

answered Aug 16 at 13:43

VolskVolsk

2,0641010 silver badges1717 bronze badges

answered Aug 16 at 13:43

VolskVolsk

2,0641010 silver badges1717 bronze badges

answered Aug 16 at 13:43

VolskVolsk

2,0641010 silver badges1717 bronze badges