(If macOS Sonoma is the last macOS installed on your Mac) To reinstall macOS: Turn off your Mac, press the power button, then immediately press and hold Command + R until you see the Apple logo.Choose a WiFi network and enter its password when prompted. (If macOS Sonoma is the latest macOS supported by your Mac) To upgrade to macOS Sonoma: Shut down your Mac, press the power button, then immediately press and hold Option + Command + R until you see the spinning globe.Step 1: Boot into Recovery Mode and get to the macOS Utilities window. Step 3: Click "Reinstall macOS Sonoma" and Continue. Step 2: Select your startup disk and click Erase. If you don't fall into the above exceptions, you can take the steps below to clean install macOS Sonoma without USB. Your Mac is Intel-based or has a T2 chip but macOS Sonoma is neither the newest macOS compatible with your Mac nor the last macOS version installed on your Mac.You have an Apple Silicon (M1 or M2) Mac, and macOS Sonoma isn't the last macOS version installed on your Mac.You can't install macOS Sonoma from Recovery Mode if: However, this method doesn't apply to all scenarios. The easiest way to clean install macOS Sonoma is from Recovery Mode. How to clean install macOS Sonoma without USB? If you want to back up not only documents but also apps, system files, and settings, you can perform a Time Machine backup.Īfter your data is secured, you can choose one of the following methods to clean install macOS Sonoma. If you have only several folders and files you want to keep, you can copy them to an external drive. Otherwise, you'll lose all your personal files because a clean install involves drive formatting. Prior to a clean install of macOS Sonoma, you need to back up the important data on your Mac. Back up your Mac before the clean install of Sonoma Prepare your Mac for sale: A clean install is a necessary step to get your Mac ready for a new user. Resolve software conflicts: If your Mac is having problems with certain apps or extensions, a clean install can help you resolve it. Improve performance and stability: If your Mac is slow or has problems that can't be fixed by other means, a fresh install of macOS is the best solution, as it removes junk files, malware, and corrupted data that may be causing troubles. Make more free disk space: A clean install clears all personal data on your Mac, which is a great way to get more available disk space if your Mac is almost full. Conducting a fresh install of macOS Sonoma is beneficial in multiple ways, including: Why do you need to clean install macOS Sonoma?Ī clean install of macOS Sonoma means erasing your Mac's startup disk and then installing macOS Sonoma. How to clean install macOS Sonoma with USB? Why do you need to clean install macOS Sonoma? Boot from the USB and perform the fresh install of macOS Sonoma. Make a macOS Sonoma bootable USB installer in Terminal.Ĥ. Format the external USB drive as Mac OS Extended (Journaled).ģ. Download the macOS Sonoma full installer.Ģ. Click "Reinstall macOS Sonoma" and Continue.Ĭlean install macOS Sonoma with a bootable USB installerġ. Select your startup disk and click Erase.ģ. Applicable to M1 and M2 Macs if macOS Sonoma is the last macOS installed on the MacĢ. Applicable to Intel and T2 Macs when macOS Sonoma is the latest macOS compatible with your Mac or macOS Sonoma is the last macOS installed on your Mac.ī. Here's a quick summary of the applicable cases of each method: How to do a clean install of macOS SonomaĬlean install macOS Sonoma without a bootable USB installerĪ. To perform a fresh install of macOS Sonoma, you can install it from a bootable USB or Recovery Mode, depending on your Mac model and whether macOS Sonoma was the last macOS installed on your Mac. It allows you to install macOS Sonoma from scratch and resolves various installation failures like " not enough space to install macOS Sonoma" and other issues on your Mac. Whether you want to upgrade to macOS Sonoma or reinstall it, a clean install is usually the most trouble-free way to get the job done.
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