User profile for user: debblx
debblx Author
User level: Level 1
8 points

Macbook Air 2017 - cannot install macOS Sierra

Hi, I am trying to reinstall my mac. I have tried a few times, including this other thread suggestion, but still no success.


When after it gets to 12 seconds to finish installing it shows the following message: "An error occurred while preparing installation. Try running this application again." In the count down is says "about - 399 seconds remaining".


At Disk Utility it shows:

Internal:

  1. AppleAPFSMedia (GUID Partition Map, Capacity 121.12 GB, Child count 2, type: solid state, device: disk2)

Untitled (Capacity:120.67 GB, Used 5.24 GB, disk2s2, Type: PCI Internal Physical Volume, Available (Purgeable + Free): 115.44 GB)

2 . APPLE SSD SM0128G Media (Unformatted - Capacity 121.33 GB, Child count: 2, Type solid state, device: disk0)


Disk Images:

Apple Disk Image Media (2.14, Disk, disk1)

OX X Base System (724.3 MB, disk1s1)


I tried First Aid, Restore, Umount, and Partition, but nothing did anything good. I also tried to install it from a pendrive with the MacOS downloaded. Nothing worked. I also don't know why the SSD looks partitioned.


Can anyone help?

Thank you so much :)


MacBook Air 13″, macOS 13.5

Posted on Oct 22, 2023 11:46 AM

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User profile for user: Owl-53
Owl-53
User level: Level 10
104,509 points

Posted on Oct 23, 2023 3:19 AM

What is presented below should Erase the Entire Drive of everything and then may presented the Lastest Version of macOS this Computer Qualifies to run which should ne macOS 12 Monterey


Shutdown the computer and connect it via an Ethernet Cable to the Router for best results


Connect to charger


While powering Up Hold the three keyboard combo Option Command r


If it works you will connect to the Apple Servers


Depending on your connection speed and the speed of Apple Servers a Spinning Globe will appear


Then once it is totally loaded >>


1-  It will present options >> Disk Utilities >> View >> View ALL attached Drives. 


2 - Choose the Upper Most Drive ( not the volumes indented and list below ).


3 - The drive normally is called Apple Media or Apple SSD - that is the drive to Erase and format as APFS with the GUID Partition Map.


4 - Once that is done >> backup out of Disk Utilities and choose install macOS. 


5 - Follow the prompts and it may automatically reboot several time. 


6 - Upon a final reboot - Setup Assist will present with the newer version of macOS.

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User profile for user: Owl-53
Owl-53
User level: Level 10
104,509 points

Oct 23, 2023 3:19 AM in response to debblx

What is presented below should Erase the Entire Drive of everything and then may presented the Lastest Version of macOS this Computer Qualifies to run which should ne macOS 12 Monterey


Shutdown the computer and connect it via an Ethernet Cable to the Router for best results


Connect to charger


While powering Up Hold the three keyboard combo Option Command r


If it works you will connect to the Apple Servers


Depending on your connection speed and the speed of Apple Servers a Spinning Globe will appear


Then once it is totally loaded >>


1-  It will present options >> Disk Utilities >> View >> View ALL attached Drives. 


2 - Choose the Upper Most Drive ( not the volumes indented and list below ).


3 - The drive normally is called Apple Media or Apple SSD - that is the drive to Erase and format as APFS with the GUID Partition Map.


4 - Once that is done >> backup out of Disk Utilities and choose install macOS. 


5 - Follow the prompts and it may automatically reboot several time. 


6 - Upon a final reboot - Setup Assist will present with the newer version of macOS.

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User profile for user: Owl-53
Owl-53
User level: Level 10
104,509 points

Nov 26, 2023 6:47 AM in response to debblx

debblx wrote:

Hi,

thank you, but unfortunately it didn’t work,
thank you

1- Welcome but judging from your posting - the Bootable Installer was Not Created


2- Yes and installing OS X 10.12 Sierra is very problematic


3- First, there is a long standing Issue in the Installer for Sierra


4- Apple has been aware of this Expired Certification in the installer


5- To date, they have chosen to ignore fixing this issue


6 - Would suggest as this computer does Qualify to run any of the below versions of macOS


7 - Then create the Bootable Installer of one of there version of macOS


8 - The follow the previous instruction to Install the new Version of the Operating System


Computer Qualify for the Monterey upgrade


macOS Big Sur 11 hardware requirements


macOS Catalina 10.15 hardware requirements

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User profile for user: debblx
debblx Author
User level: Level 1
8 points

Nov 26, 2023 5:24 AM in response to Owl-53

Hi,


thank you, but unfortunately it didn’t work, after clicking to reinstall (Sierra), it says “to download and restore macos, your computer’s eligibility will be verified with apple”. I click “continue”.

It comes back with “UNTRUSTED_CERT_TITLE”. When I click okay, it comes back to macOS Utilities options.


any idea what went wrong?


thank you

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Macbook Air 2017 - cannot install macOS Sierra

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