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- #REINSTALL MAC OS DISK UTILITY HOW TO#
- #REINSTALL MAC OS DISK UTILITY SERIAL NUMBER#
- #REINSTALL MAC OS DISK UTILITY UPGRADE#
- #REINSTALL MAC OS DISK UTILITY DOWNLOAD#
Now move the dial up, to randomly write data over your entire drive. You still need to wipe the drive, however, or your files will remain in place, so skip to the end of this step to do so.) (If your Mac has a solid state drive, you can skip this part: your SSD will already securely erase files thanks to TRIM. If you’re wiping a mechanical drive, click “Security Options” in the window that pops up. Click your primary drive, then click “Erase” If not you can find Disk Utility in the menu bar: click Utilities then Disk Utility. To get started, click the Disk Utility option.ĭepending on how you started Recovery Mode, you may be presented with the option to start Disk Utility right away, as seen above.
#REINSTALL MAC OS DISK UTILITY HOW TO#
We’ve shown you how to securely wipe a hard drive with your Mac, and doing so in Recovery Mode isn’t really different from doing so within macOS. If you want a truly clean installation, however, you need to first wipe your hard drive. We recommend backing up files before you do this, just in case, but otherwise you’re ready for step three. Your user accounts and files will stay exactly where they are-only your operating system will be overwritten. If you want to re-install your operating system, but leave your files in place, you can skip this step. RELATED: 8 Mac System Features You Can Access in Recovery Mode Step Two: Securely Wipe Your Hard Drive (Optional) Once you’ve managed to open up the Recovery Mode in some fashion, we can move on to wiping your drive securely.
#REINSTALL MAC OS DISK UTILITY DOWNLOAD#
You can access recovery without a partition using Network Recovery: hold Command+Shift+R while turning on your Mac and it will download the Recovery features for you. Failing that, you can create a bootable USB installer for macOS Sierra, and boot from that by holding “Option” while turning on your Mac. If you need anymore help in regards to this please contact us here.If neither of these options work, don’t panic! You’ve got a couple of options yet. If you're keeping your Mac, complete the setup assistant with your own information.If you erased your disk before installing, or you installed on an external drive or other new disk, your Mac restarts to a setup assistant. Your Mac restarts after installation is complete.
#REINSTALL MAC OS DISK UTILITY SERIAL NUMBER#
To verify eligibility to install macOS, your Mac serial number is sent to Apple, and you might be asked for your Apple ID. If you don't see it, click Show All Disks.
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If you need to erase your startup disk, follow these steps. On a rare occasion your Mac may have a virus or a piece of Malware.Įrasing your startup disk permanently deletes all of the data stored on it.You need to give the Mac to another colleague and it needs to be clean from old data.You need to give the Mac back to HardSoft.The macOS installer says that it can't install on your computer or volume.You're trying to resolve an issue that Disk Utility cannot repair.You should erase your startup disk in the following circumstances. When you see the macOS Utilities window, continue to the next section to determine whether to erase your machines hard drive or begin installing macOS.ĭecide whether to erase (format) your startup disk before installing macOS. This combination requires macOS Sierra or later. Install the macOS that came with your Mac, or the version closest to it that is still available.
#REINSTALL MAC OS DISK UTILITY UPGRADE#
Upgrade to the latest macOS that is compatible with your Mac. Install the latest macOS that was installed on your Mac, without upgrading to a later version. Release when you see the Apple logo or a spinning globe. Hold down one of the following combinations immediately after pressing the power button to turn on your Mac. The Recovery installs different versions of macOS depending on the key combination you press while starting up.