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Macos catalina usb installer install#
Macos catalina usb installer update#
Macos catalina usb installer upgrade#

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Macos catalina usb installer install#

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macOS 10.15 Catalina Compatibility: Full List Of Compatible Macs.

Next step is to do a clean install of your Mac using this drive, instructions for which can be found over at: Clean Install macOS 10.15 Catalina On Mac Via USB Drive, Here’s How. You should now have a bootable USB drive of macOS Catalina installer. It will then start copying data over to the disk to leave you with a fully bootable USB drive running macOS Catalina.Īnd that’s about it. The Terminal will now show that the disk is being erased and prepared. Then type Y and press Return to continue when prompted. Step 9: Press Return on the keyboard and enter the password for the machine.

You will now have a full command pre-populated. Click on this and drag and drop it into the Terminal window app. Step 8: Now, go back into the Finder window, select connected drives and locate your USB drive.

Step 7: After the text that it automatically populates, type –volume, hit the space bar so you should end up with “sudo –volume “ You will notice that it places text into the Terminal window. Type sudo, hit the space bar, and then drag and drop the createinstallmedia file from the Finder window into Terminal. Step 6: Keep that Finder window open and launch Terminal on the Mac. So if anyone is reading this, remember to go back in time and create a bootable installer for your future self.Step 5: Navigate to Contents > Resources and then locate the createinstallmedia file. I'm gonna leave this post up on the off chance that it might save someone some time in the future if they are having the same issue, even though the issue itself was only solved by my past self. I would prefer to create a legit installer straight from Apple, but all my "research" (googling) leads me to think that it might be impossible.ĭoes anyone here know how I can accomplish this? Many thanks for any advice you can give me.Įdit: As I said below in the comments, I've found an old USB drive with yosemite on it, so I'm hoping that will solve the problem. Through all my googling I have found dosdude1's Catalina patcher that might do what I need, but it seems to be an unsupported version of Catalina.

Macos catalina usb installer upgrade#

I also tried downloading the Sierra Disk IMG from apple's website, thinking he could just upgrade to Catalina when he got everything up and running, but again I can't create an installer from the Sierra IMG because my M1 is not compatible with that OS. But the app store won't let me download the Catalina installer on an M1. The problem now is that I have given my old iMac to my brother-in-law and I am trying to create a bootable usb so he can install Catalina to an SSD like I had it before. I purchased an M1 Mac mini a few months ago and repurposed that external SSD for my M1. My Late 2012 iMac's fusion drive died a little over a year ago but before it went completely I was able to install MacOS to an external SSD and run my iMac off that.