Format External Hard Diskįurthermore, you should be able to boot your portable macOS installation on any Sierra-compatible Mac, meaning you can carry your own personalized Mac desktop with you wherever you go. In order to select a different Startup Disk, you will need to click the lock in the lower-left corner. Once your Mac restarts, it will take about 15 more minutes to finish, and will then boot automatically from the new device. Double-click the installer to begin.īefore macOS can complete installation, your computer will need to restart. When the operation is complete, you will see the following message.
Install OS X Snow Leopard from a USB flash drive You can also give your device an appropriate name, if you want. If it does not, you might have identified the wrong disk. When you do this, the icon for the flash drive disappears from your desktop. LEt the macpro run for two days as i want to make sure all the updates have done properly. Tried the command line to cretae it to 6. Sorted… I spent a lot of time to figure out these issues. Anyone out there have an answer? I thought I did since I downloaded Mojave, but the file was corrupted. I tried going in system preference to change the start up disk and USB is not showing up as option.
You don't need a bootable installer to install macOS, but it can be useful After downloading the installer, connect the USB flash drive or other.
How to Clean Install macOS 10.13 High SierraĬhoosing a USB Flash Drive for Installing Mac The 12″ MacBook has a single USB-C port, while MacBook Pro models from and later. 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. 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. Open Finder.īilly: You are actually doing everything correctly.
The general recommendation is to skip the manual method for any version of the Mac OS that is newer than OS X Mavericks, and instead use the Terminal method and the createinstallmedia command, as outlined. If your Mac is only compatible with OS X Yosemite or earlier, you need to use an installation disc to get earlier software on your hard drive. And, just providing a link isn't very helpful as it may no longer work in future. If your Mac is from or earlier, there was an installation disc in the original box. Terminal is the easiest way to create your bootable USB drive. After selecting it, click on the Erase button along the top. I don't think it will make much difference. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.
Visit the Get Support website to speak to an advisor online or make an appointment at your nearest Apple Store to see install mac os x from usb disk Genius. In this second half of the guide, we will make use of the flash drive to perform a clean installation. How do I get back to those choices?įind your Mac model listed toward the top of the window. I did this, but chose Disk Utility instead of Install Software. Thank you! I have already made the bootable USB flash drive. I have enabled boot from USB and disabled the security checking too. I have a new Macbook air and need to wipe the hard drive install Mojave I have created to install media, but did not use the -nointeraction flag.īut when I select it I get the lined circle. To boot from the Mojave installer USB drive you must select that boot disk from the startup menu during system boot, you can do that by hold down OPTION key during system start of the Mac and you can select the Mojave Installer drive from the boot menu.
Also, The installer does not appear as a bootable drive under Preferences - as I would think it should. Make sure your Mac is compatible with Mojave.