#Clean install of mac os sierra serial number
#Clean install of mac os sierra upgrade
#Clean install of mac os sierra download
#Clean install of mac os sierra free

If you've installed macOS Sierra, but your Mac won't start, then restart your Mac and hold down Command, Option, P and R, which will reset the NVRAM (non-volatile RAM). macOS Sierra problems: macOS Sierra won't start Then restart your Mac and try to install macOS Sierra again.

#Clean install of mac os sierra free

Once in safe mode delete any unnecessary files, or move them to an external hard drive, to free up some disk space. When the grey Apple logo appears, release the Shift key. Once you hear the startup tone hold down the Shift key on your keyboard. To do this, turn off your Mac and wait 10 seconds, the press the power button. If you get an error message while installing macOS Sierra saying that you don't have enough hard drive space, then restart your Mac and boot into safe mode. macOS Sierra problems: Not enough space to install

#Clean install of mac os sierra download

It might also be worth switching from a Wi-Fi connection to a wired connection before you download and install. Boot your Mac into Safe mode, then try installing macOS Sierra again. If you need anymore help in regards to this please contact us here.Press the power button on your machine while holding down the Shift key on your keyboard. 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.

#Clean install of mac os sierra 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.

Click Continue, then follow the onscreen instructions.

Choose Reinstall macOS (or Reinstall OS X) from the utilities window.

You're now ready to install macOS.ДЇollow these steps after starting up into the recovery agent:

When done, quit Disk Utility to return to the utilities window.

Click Erase to begin erasing your disk.

Select your device or volume in the sidebar of Disk Utility.

Select Disk Utility from the utilities window of macOS Recovery, then click Continue.

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.Д®rasing 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.Дecide 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.

#Clean install of mac os sierra 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.