**Creating a Mac OS 15 Beta USB Installer**
The process of creating a Mac OS 15 beta USB installer involves several steps, which will be outlined below.
To begin, download the install Mac OS 15 beta installer from Apple's servers. This can be done by opening the Applications folder on your Mac and navigating to the "macOS" directory. From there, locate the "Install macOS High Sierra (or later).app" file and double-click it to launch the installation process.
Once the installation is complete, the install Mac OS 15 beta installer will be located in the Applications folder. To create the USB installer, open up the Terminal application on your Mac by searching for it in Spotlight or navigating to /Applications/Utilities/Terminal.app. From there, type `paco -u` into the terminal window and press Enter.
Next, locate the "createinstallmedia" executable within the install Mac OS 15 beta package using the Finder application. This can be done by right-clicking on the installer package and selecting "Show Package Contents." Navigate to the "Resources" folder within the package and find the "createinstallmedia" executable.
Now that the executable has been located, use the Terminal application again to type `./createinstallmedia -volume /dev/disk1s3` (assuming your USB drive is mounted on disk1s3) and press Enter. This will begin the process of creating the USB installer.
Once the creation process has begun, navigate to Finder by pressing Command + Tab or clicking on the Finder icon in the top left corner of the screen. In the Finder window, locate the "Volumes" folder on the left-hand side and click on it to display a list of all connected volumes.
Identify your USB drive within the list of volumes and double-click on it to open its contents in a new Finder window. Make sure there are no files or folders on the USB drive that you want to erase, as this will cause issues with the creation process.
If necessary, use the "Get Info" option in the Finder to verify that your USB drive is formatted as "Mac OS Extended (Journaled)" and has sufficient capacity for installation. To check the formatting of a volume using the "Get Info" option, open a folder on the USB drive by clicking on it with the mouse or pressing Command + Click. Next, click on the "Get Info" button in the top right corner of the window to view detailed information about the file system.
If your USB drive is not formatted as required, use the "Disk Utility" application to reformat it. To do this, open the Disk Utility application by searching for it in Spotlight or navigating to /Applications/Utilities/Disk Utility.app. Select your USB drive from the list of available disks on the left-hand side and click on the "Erase" button in the top right corner of the window.
Once the "Erase" option has been selected, click on the "Quick Erase" button and then select "Mac OS Extended (Journaled)" as the file system format. Make sure to check that the "Security Options" slider is set to "None," as this will prevent any encryption from being applied to the installer.
After reformatting your USB drive, go back to the Terminal application and navigate to the location of the "createinstallmedia" executable using the Finder application. To do this, open a new Terminal window and type `cd /Applications/Utilities` (or navigate to the "Utilities" folder in Spotlight) followed by `cd diskutil` to find the path to the Disk Utility application. From there, use `cd /Applications/Utilities/Disk\ Utility.app` to display the location of the Disk Utility application on your system.
Once you have located the Disk Utility application, navigate back to the Terminal window and type `./createinstallmedia -volume /dev/disk1s3` (or enter the path to your USB drive) followed by pressing Enter. This will begin the process of creating the USB installer.
As the creation process progresses, you may see a progress bar that appears to be stuck or moving very slowly. If this occurs, it is likely due to network connectivity issues and can be resolved by restarting your router or checking your internet connection.
Once the creation process has completed, the install Mac OS 15 beta package should now appear in your Terminal window as "Install macOS High Sierra (or later).app". This indicates that the USB installer has been successfully created.
To verify that the USB installer has been created correctly, open a new Finder window and navigate to the "Volumes" folder. Double-click on the USB drive to open its contents, and then double-click on the "Install macOS High Sierra (or later)" package to launch it.
If you are using the install Mac OS 15 beta package successfully, you should see a menu that allows you to select language settings and other options before proceeding with the installation process. If you encounter any issues during this time, it may be necessary to restart your Mac or seek further assistance from Apple Support.