Cmd R For Mac



Updated Guide Steps:

In this document R refers to the core, command-line-based R system while R.APP refers to the GUI-based Mac OS application that controls the underlying R. This ‘R for Mac OS X FAQ’ is rather incomplete at the moment and requires contributions from users.

Most Windows commands will work in OSX by simply pressing 'command' instead of 'control'. For example, ctrl+v (paste) ctrl+c (copy), ctrl+z (undo) and ctrl+a (select all) still all work on a Mac, just replacing the control key with the command key. With your Mac turned off, press and hold the Command and R keys on your keyboard, then press the power button. Hold in Command+R until you see a progress bar show up below the Apple logo. Windows and Mac Keyboard Differences. At least five keys have different names or symbols on a Windows keyboard than they do on a Mac keyboard, which can make it difficult to follow Mac-related instructions. For example, a software manual may tell you to hold down the command key ( ⌘ ), which appears to be missing from your Windows keyboard. This directory contains binaries for a base distribution and packages to run on Mac OS X (release 10.6 and above). Mac OS 8.6 to 9.2 (and Mac OS X 10.1) are no longer supported but you can find the last supported release of R for these systems (which is R 1.7.1) here.

You need to use a secondary boot drive in order to install a recovery partition to your main drive. The reason for this is because dmtest is unable to write anything to your boot drive now.

  1. Download the latest recoveryscripthere.
  1. Download Mac OS High Sierra from the app store.
  1. Boot from another drive with Mac OS X while your main drive (where you want the recovery partition) is still connected. You can use SuperDuper to clone an install of your Mac OS drive if you want to use that for booting from a 2nd
  1. Open therecovery.sh script in TextEdit. Change the TARGET and MACOS_INSTALLER fields inside the script to match the volume and path you want to install a recovery partition to and where the script can find the Mac OS X High Sierra installer. The High Sierra installer is likely on your main drive so just point to that path. Save the script after.
  1. Run the recovery.sh in terminal with sudo.

After the script completes, you will have a recovery partition created. You can check for it in Disk Utility.

Note: You will not be able to install a recovery partition on an Apple RAID drive. These steps will fail and you will receive the following message:

For

Error (async): The given disk has a storage system (such as AppleRAID) which is not supported for this operation (-69718)

Old Guide Steps:

In this guide, we will update a Mac’s old recovery partition(10.7 Lion or younger) to Mac OS High Sierra 10.13.5. Mac OS does not automatically update the recovery partition on Apple computers when you update the OS or re-install a new copy of the OS. This can be frustrating in certain circumstances. For example, the 10.7 recovery partition does not include the same Terminal bash commands as High Sierra, such as csrutil.

The Mac OS X recovery boot options

Command ⌘ + R (Partition Recovery):

This will attempt to boot from a recovery partition on your hard drive. A recovery partition

Cmd For Mac Address

Is created by default when you install Mac OS X for the first time.

Option + Command ⌘ + R (Internet Recovery):

This boots to Internet Recovery mode and will only grab the version of Mac OS X that originally shipped with the Mac. This is behavior controlled by the Apple servers and you will not be able to change the Internet recovery re-install image unless Apple decides too. This means if you re-install Mac OS Lion 10.7 on a Mac that shipped with 10.7 and decide to upgrade to High Sierra, you will still have the Lion 10.7 Internet Recovery image. The exception are the Macs that originally shipped with a recovery DVD prior to Lion, or earlier Macs that lack the firmware update to boot into Internet Recovery. On some older Mac’s, Internet recovery is done with key combo shift + option + command ⌘ + r.

Cmd R For Mac Osx

In this case, we will update the recovery partition on our MacBook Pro 2011 from the default 10.7 Lion recovery partition to the High Sierra recovery partition 10.13.6.

  1. Download the latest Mac OS High Sierra installation from the App Store. After downloading, right-click the installation file (located inside Applications) and choose show package contents. Browse to Contents/SharedSupport and copy InstallESD.dmg to your Mac user Downloads folder.
  1. Downloadrecovery.zip here, unzip it, and place the recovery.sh file in your Mac user Downloads folder.
  1. Download Lion Recovery Update v1.0here and copy it to your Mac user Downloads folder. (We will use the Lion recovery updater to update the recovery partition for this process)
  1. Verify your 3 files are inside your user home Downloads folder – recovery.sh, RecoveryHDUpdate.dmg, InstallESD.dmg.
  1. OpenTerminal(Applications -> Utilities) and type the following commands.

Verify you see Creating recovery partition: finished message. Don’t worry about the other messages displayed – including the common last line below. It can be safely ignored!

touch: /Library/Preferences/SystemConfiguration/com.apple.Boot.plist: Operation not permitted

Test your new recovery partition. Reboot and hold down Command ⌘ + R.

Finally, the only other recovery option available is to install Mac OS High Sierra on a bootabledrive(USB or portable drive) using Install Disk Creator.


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We can find mac address (physical address) of a computer using the command ‘getmac‘. This can be used to get mac address for remote computers also. Below are few examples on how to use this command. It works on XP, Vista, Windows 7, Server 2003 and Server 2008 operating systems.

Get mac addresses from CMD

Just run the command getmac to get the mac addresses. Find an example below.

This command does not show mac addresses for the network connections which are disabled. You can run ncpa.cpl and check which NICs are disabled. Further, I have received comments that this command does not help identify the mac address for a specific device. For example, if I need to get the mac address for my WiFi card, output of getmac command is not helpful. We can use ipconfig command to deal with this.

Get mac address of a remote computer

Mac

We can retrieve the mac addressses for a remote computer using nbtstat command.
Example:

Alternatively, We can run the below command to retrieve the mac addresses of a remote computer.

remote_computer : Full name of the remote computer or IP address
username and password are of the account on the remote computer.

Example:

If you do not want to specify the password, you can skip /p parameter. You will be prompted to enter the password and the command execution will take place after that.

Errors:

Using getmac command we can retrieve the mac addresses of the machines running windows OS only. If you try this for a Linux machine you would get the error “The RPC server is unavailable.”

If you provide incorrect password, the command would fail with the error message “Logon failure: unknown user name or bad password.”

Also Read:
Windows CMD commands reference