![]() ![]() Step 3: Launch TransMac software with admin rights by right-clicking on TransMac icon on the desktop and then clicking Run as administrator. The drive will be erased completely during the process of making a bootable USB. Step 2: Stick in the USB drive that you want to boot and install macOS from and backup all data from it, if any. Even though TransMac is a paid software, the 15-day trial copy is good enough to prepare the bootable USB of Mac on your PC. Step 1: The first step is to download TransMac software and install the same on a PC running Windows operating system. NOTE: The guide was originally written to prepare Yosemite bootable USB but the guide is compatible with the latest macOS Mojave as well. Simply follow the given below instructions to prepare your bootable USB of macOS on a PC. ![]() If you have the DMG file of macOS and a USB flash drive of size greater than 16 GB, it’s easy to prepare the Mac OS X bootable USB on a Windows PC. The only thing is that you must have the DMG file of macOS. Can't get disk "Install MacOS Mojave" (which is right there in the Apps folder).Mac users who don’t have access to a bootable Mac machine to prepare the bootable USB of macOS can take the help of a computer running Windows operating system for the job. Switched to a different Mac Pro (also 10.13.6) and tried using Disk Maker X. yeah.Īlso tried using using Install Disk Creator 1.4 which encountered an error (being unable to unmount the target volume for the installer) no matter which 128 GB flash drive I inserted. For more information, please see the following. To use this tool, you must download the macOS installer application on a Mac with 10.12.5 or later, or El Capitan 10.11.6. ZChangeNameTrashcan-2:~ admin$ sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia -volume /Volumes/Installer Problem is, running this exactly as written (including having the target flash drive formatted in Mac OS Extended format) results in the following erroneous error message in Terminal: I am trying to use this method for making a bootable Mojave installer: I am on a Mac Pro ("trashcan") running 10.13.6. I would appreciate any help as to how to get the flash drive into a working installer for Big Sur because the 2016 MacBook Air is unusable until I can reinstall macOS on it. ![]() The MacBook I am creating the installer on came with Big Sur preinstalled, so it should be able to create an installer for it. I have tried using the flash drive as both ExFAT and Mac OS Extended (Journaled), both times in GUID Partition Map Scheme. 100%Įrror: Error Domain=NSCocoaErrorDomain Code=512 "“MacOS” couldn’t be copied to “Contents”." UserInfo=The copy of the installer app failed. I have tried multiple times but keep getting the same error:Įrasing disk: 0%. I have a 32GB flash drive that I am trying to make into a bootable installer and I have downloaded the macOS Big Sur installer, but when I try to use terminal to complete the process, I get an error that I haven't found a working solution to online. In addition, I also used the same steps to try to create a bootable installation drive using a 500 GB hard drive, but it doesn't appear upon option/startup either.Įrror creating a macOS Big Sur bootable installer I am trying to create a bootable installer for macOS Big Sur on an M1 MacBook Air to use on a 2016 MacBook Air that cannot reinstall macOS in recovery mode. I would have thought that the process of creating a bootable drive would add a set of system and user folders to the drive as well. In either case, the drive does not show up when I restart and hold down the Option key, nor does it show up in System Preferences/Startup Disk.Īfter creating the bootable drive, the only file on the drive is "Install macOS Mojave." This file appears to be identical (exact same # of bytes) as the "Install macOS Mojave" app that I downloaded from Apple into my Applications folder, in other words, the process appears to have simply copied the installer. I created the drive in two ways, using the terminal commands given here, as well as by using the "Install Disk Creator" software package. I formatted the 16 GB drive using Mac Extended (Journaled) with a GUID partition. Cannot boot to Mojave bootable USB installer I am trying to make a bootable USB drive installer for Mojave. ![]()
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