Copy mac os x to usb

Bear in mind that the case for doing this at all on modern Macs is slimmer than ever if all you want to do is clean install the OS onto one particular machine. I always get an error on the globe after I connect to the Internet, and sometimes even before. So, the USB key is still very important. Yes you can use DiskMaker to create a boot MacOS Mojave installation disk, but why bother getting a third party app when you can do it all yourself from the command line? Ummm, if this bootable drive will be used just to install Mojave on other Macs then why go through all the hassle of creating the drive when all you have to do is copy the Mojave installer file directly to the USB drive and then double-click on the installer file?

You can boot up a Mac with the disk, then do whatever you want; format it, update it, perform other tasks from the boot disk. I have created the bootable usb and i have booted to the clean install installer but right after selectinv the Install macOS mojave from the option screen wjen it goes to boot the usb apple logo it brings a prohibitory sign at middle of loading to install macOS mojave i have checked the checksum of the downloaded file but looks like it ia ok , i have also checked the startup disk with first aid everything seems ok but still get the prohibitorh sign , i was able to update to mojave but not clean installinv this is really wierd: The command line syntax must be an exact match, including the path and drive name of the flash drive.

And yes the command line also requires precision in capitalization too as part of the syntax, uppercase and lowercase are different. Same here!

I changed it to Untitled and it worked! Thanks for the solution! I have followed all of the steps correctly, however when I go to boot up my MacBook and install Mojave it tells me that my external hard drive is locked….. Correct, you need the full installer. I created the bootable drive but when I tried to boot from it the apple logo appeared with loading bar at the bottom which never finishes loading it continued loading for more than an hour with nothing new.

OSX Yosemite - How to Create A Bootable USB Flash Drive

To use this tool, you must download the macOS installer application on a Mac with For more information, please see the following: Apple has not been able to help me. Anyone out there have an answer? I thought I did since I downloaded Mojave, but the file was corrupted. Re-downloaded and the message went away. Hope this helps.

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I was able to create bootable USB. I tried going in system preference to change the start up disk and USB is not showing up as option. I got the install media created and was able to boot… until a circle with a slash shows up. Does anybody know the reason for this? You are actually doing everything correctly.


  • Things to know before proceeding.
  • How to clean install macOS Mojave 10.14.
  • mac mini 2011 vs late 2012.
  • How to create a bootable macOS Mojave USB install drive [Video] - 9to5Mac!

The potential reason you are receiving the circle with the slash through it is that your older Apple Macintosh hardware is incompatible with the operating system upgrade. However, if you do have a compatible model from the link below, your drive is encrypted and additional steps are required to facilitate the upgrade. I did this, but chose Disk Utility instead of Install Software.

Keep the installer safe

How do I get back to those choices? Just click out back to your finder. I see that there has been an update ready for Mac OS Before I wasted time rebooting everything, I used the directions above to make the bootable drive using a nice Samsung 3.

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How to quickly create a macOS bootable USB on Windows • Pureinfotech

I have already made the bootable USB flash drive. Name required. Mail will not be published required. All Rights Reserved. Reproduction without explicit permission is prohibited. Enter your email address below: Posted by: Chris Altwegg says: September 26, at 5: Trig says: September 28, at 2: Sebby says: Claude says: September 27, at 8: Jan Kristensen says: September 27, at 7: Ben says: Jeff Siegel says: October 2, at 9: Patrick says: November 11, at 4: Richard B says: September 27, at Oink says: Luk says: September 28, at 6: September 28, at 7: September 28, at 8: February 4, at Hazhir says: October 2, at 7: Richard Kriss says: Apple Difficulty level: For You.

How to Clean Install macOS High Sierra – Includes installing macOS from a USB device

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