Swap to the newly mounted image cd /Volumes/InstallESD.dmg
Mount the InstallESD.dmg buried deep in the app hdiutil attach /Applications/Install\ OS\ X\ Mavericks.app/Contents/SharedSupport/InstallESD.dmg -noverify Just for the crazy ones……after Mavericks is downloaded….and again this assumes you external disk is named BootDisk
FORMAT OS X MAVERICKS HOW TO
Otherwise I suspect that the iMac's hard drive has been formatted improperly beforehand.If you want all to return back to normal and hide the system files run a couple more commands in the Terminal defaults write AppleShowAllFiles FALSE killall Finder How to create the OSX 10.9 Mavericks Bootable Drive just via Terminal During the OS X Mavericks install, you should be able to move the mouse up to the top left of the screen, and something should show up. erase and reformat the hard drive as MacOSJournaled, and GUID on, and then try to reinstall the OS. If you can, start up from the recovery partition and run Disk Utility from there. How in the world did you get OS X Mavericks ? If you start up your iMac, with the option key held down, it will show you all bootable hard drives. You can either check Apple's support page for Desktop computers, or if you can't wait, like me, google, or yahoo should get you that info. First off, you might want to reset the SMC/PMU and zap pram on your iMac. You might have to move the mouse to the top center of the screen, and maybe OS X Tools might show up.
That being said, you should be able to accesss Disk Utility from the Mavericks install.
FORMAT OS X MAVERICKS INSTALL
Oh goodness gracious !! Usually you can't go back, eg, if you had Mojave, you can't install Mavericks on top of it. The above procedure will install the version of macOS that was pre-installed when it was new. BTW, if your internal disk is an HDD of Fusion Drive, then do not use APFS. If the disk still does not show up, then it has died.
FORMAT OS X MAVERICKS MAC OS
Set the Format type to APFS (SSDs only) or Mac OS Extended (Journaled.).Click on the Erase tab in Disk Utility's main window.When Disk Utility loads select the target drive (will be the out-dented entry) from the side list.Select Disk Utility and click on the Continue button.
The Utility Menu will appear in from 5-20 minutes.Immediately after the chime hold down the (Command-Option-Shift-R) keys until a globe appears. If possible back up your files before proceeding. Internet/Network Recovery of El Capitan or Later on a Clean Disk
You need to establish an Internet connection, preferably Ethernet or fast Wi-Fi. I turned it off and then turn on pressing command + R, then I got MacOs Utilities I select -Disk Utility then choose Internal choose hard drive the one I wanted to erase,I selected APFS the erase, then I went to Reinstall MacOs, then iMac was all black screen so I turned it off then back on and I got a black screen with a flashing icon folder in the middle, then I turned it off turned back n pressing command + R and I got OS X Utilities, I choose Reinstall OS X and after that I get the OS X MAVERICKS and after I click continue I see the picture screen OS X Mavericks Select the disk where you want to install OS X "" but THERE IS NOT DISK TO SELECT" :( Please see picture I didn't back up any of my files because I have another iMac and I have everything there. My 2013 iMac was working perfectly fine with MacOs Mojave, then I believe I made a big mistake, one time it wasn't printing after many attempts to print, I deleted printers so I could add them again but I could't find the option to add a printer so I decided to reset iMac like I will sell it so I could start from scratch.