Purple (Nimerra) Mac OS

Double-click on the .DMG disk image file. This will mount it on the Desktop just like a real disk drive. Double-click on the disk icon to open a Finder window on the content. You will find the installer which you can copy to your Applications folder. To make a bootable USB installer:

  1. On a 5,1, OS 10.12.6 is the minimum OS for RX580 support. It will show in About this Mac as a more generic GPU, but it works. I've done this very install on a friends cMP. He wants to stay on 10.12 for FCP7 support. RX580 support gets better through 10.14.6. That's what I run on my cMP with RX580.
  2. Wallpaper of Mac OS for fans of Purple 22239121.



Title Developer/publisher Release date Genre License Mac OS versions A-10 Attack! Parsoft Interactive 1995 Flight simulator Abandonware 7.5–9.2.2. Eventually you will see a bar chart showing what types of files are taking up space on your Mac, similar to the image below. In our case, yellow is Photos, red is Apps, light blue is Messages.

Bootable USB Installers for OS X Mavericks through Catalina


First, review this introductory article: Create a bootable installer for macOS. Second, read this How To outline for creating a bootable macOS installer. Simply use the Terminal command by copying and pasting the command line for the version of macOS from the list below. You will need an 8GB or larger USB flash drive that has been partitioned and formatted for use with OS X as well as an installer for the desired macOS version that you have previously downloaded from the App Store.


Drive Partition and Format


  1. Open Disk Utility in the Utilities' folder.
  2. After Disk Utility loads select the drive (out-dented entry with the w/type and size info) from the side list.
  3. Click on the Erase button in the Disk Utility toolbar. Name the drive, 'MyVolume'. <---- IMPORTANT!
  4. In the drop down panel set the partition scheme to GUID. Set the Format type to Mac OS Extended (Journaled.)
  5. Click on the Apply button and wait for the Done button to activate. When it does click on it.
  6. Quit Disk Utility.


Create Installer


Open the Terminal in the Utilities' folder. Choose the appropriate command line (begins with 'sudo') depending upon what OS X installer you want. Paste that entire command line from below at the Terminal's prompt:


Command for macOS Catalina:

sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume


Command for macOS Mojave:

sudo /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume


*Command for macOS High Sierra:

sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume


Command for macOS Sierra:

Purple Nimara Mac Os X

sudo /Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install macOS Sierra.app


Command for El Capitan:

sudo /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X El Capitan.app


Command for Yosemite:

sudo /Applications/Install OS X Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X Yosemite.app


Command for Mavericks:

Mac Os Download

sudo /Applications/Install OS X Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install OS X Mavericks.app


Purple (Nimerra) Mac OS

Press RETURN. You will be asked for your admin password. It will not echo to the Terminal window. Then press RETURN again. Wait for the return of the Terminal prompt signifying the process has completed. It takes quite some time to finish. Be patient.


The bootable installer can be used to install the selected version of macOS. Shut the computer down. Insert your flash drive into a USB port. Start the computer like so:


Boot Using OPTION key


  1. Restart the computer.
  2. Immediately after the chime press and hold down the 'OPTION' key.
  3. Release the key when the Boot Manager screen appears.
  4. Select the disk icon for the USB flash drive.
  5. Click on the arrow button under the disk icon.


Apr 25, 2020 12:18 PM

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