#Instaling Sierra mac os#
#Instaling Sierra install#
#Instaling Sierra portable#
#Instaling Sierra pro#

In the sidebar, select a disk or volume, then click the First Aid button .

If you check your startup volume (Macintosh HD), make sure you also check your data volume (Macintosh HD - Data).

Note: If you’re checking your startup disk or startup volume, restart your computer in macOS Recovery, select Disk Utility in the macOS Utilities window, then click Continue.

In the Disk Utility app on your Mac, choose View > Show All Devices.

If you run First Aid on a volume, Disk Utility verifies all the contents of that volume only. If you run First Aid on a disk, Disk Utility checks the partition maps on the disk and performs some additional checks, and then checks each volume. Disk Utility can’t detect or repair all problems that a disk may have. Repair a storage device in Disk Utility on Macĭisk Utility can fix certain disk problems-for example, multiple apps quit unexpectedly, a file is corrupted, an external device doesn’t work properly, or your computer won’t start up. In the sidebar, select the top entry for a disk, then choose Erase.

Note: If you’re checking your startup disk or startup volume, restart your computer in macOS Recovery, select Disk Utility in the macOS Utilities window, then click Continue. In the Disk Utility app on your Mac, choose View > Show All Devices.

#Instaling Sierra install#

You might need an external dive to install to.īoot into Restore Mode, CMD+r, Look for Tools or Utilities Menu, In the Disk Utility app on your Mac, choose View > Show All Devices. Is there a way of doing a clean install via Terminal? I followed prep directions from an Apple Support page to the letter.

#Instaling Sierra portable#

My old school Time Capsule died last year, so backups from multiple Macs are all on a USB3 portable HD. Even an attempt to simply reinstate High Sierra from a Time Machine backup failed. So I downloaded it, recreated a USB boot installer with that installer and then got the error 'The recovery server could not be contacted' again.ģ. Then tonight I read I should try the file “Install 10.13.6 macOS HIGH SIERRA”. Several more attempts installing High Sierra to the system drive also got stuck. Two early attempts failed (they stopped at a window with a stuck progress bar)Ģ. I want to install High Sierra to an NVMe 480GB SSD. Many attempts have failed, the last three failed with the message: 'The recovery server could not be contacted'. High Sierra has been on this machine for two years.

#Instaling Sierra pro#

The OS version that is to be installed (automatically) is MacOS Sierra.Īny suggestions as to why this is happening and how I can potentially fix it? 1022 7Ĭlean Install of High Sierra: Multiple Fails, Pls Advise I'm trying to clean install High Sierra on a Mac Pro 5,1 (mid-2010, 6-core). Also the whole installation is via ethernet and not wifi. I also made sure the system clock is in sync with. I have tried the whole process of erasing and reinstalling mutliple times. 'An error occurred while preparing this installation. The installation started normally but then in the last 2-3 seconds the installation keeps failing giving the following message:

#Instaling Sierra mac os#

Use Disk Utility to erase a Mac with Apple silicon - Apple SupportĪfter I did that (renamed the drive to Macintosh and then formatted it using the Mac OS Extended (Journaled) option) the installer could see the drive. Because the system could not see the disk I followed the instructions for erasing my disk here: My machine has an intel cpu: i7-7700k so I followed the intel based instructions. Currently I am in the process of reinstalling the OS from Recovery following the instructions here: Part of the policy is to wipe the HDD/SSD of any machine they decommission. Recently I purchased an iMac from my university's surplus auction. Reinstalling MacOS Sierra Problem (failing in the last 2 seconds) Hello everyone,