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I cannot install macos sierra it says The installer information on the recovery server is damaged. I have tried changing the daye so that i can use expired certificates cause that was what was recommended but then another message pops up that says untrusted certificate title . What can i do to fix this problem?
I am using macbook pro 13” 2017
MacBook Pro 13″, OS X 10.11
Using MacBook pro 13” 2017 should not say Sierra if using Option-⌘-R it should likely say Ventura.
In Disk Utility what Format is the drive?
APFS won't work for Sierra, Sierra needs MacOS Extended Journaled.
Using MacBook pro 13” 2017 should not say Sierra if using Option-⌘-R it should likely say Ventura.
In Disk Utility what Format is the drive?
APFS won't work for Sierra, Sierra needs MacOS Extended Journaled.
What has often worked for others is to use this Restore Method instead of CMD+r keys...
Option-⌘-R
Upgrade to the latest macOS compatible with your Mac.
2017 iMac failing to install Sierra in re… - Apple Community
Do you have the Touchbar or non-Touchbar model?
If your WiFi connection dropped, then try connecting the laptop directly to the router using an Ethernet cable and a USB-C Thunderbolt 3 to Gigabit Ethernet Adapter. Otherwise you will need to figure out why the laptop disconnected from the WiFi which will most likely be difficult.
If you have access to another Mac for Late-2009 to 2023, then you can create & use a bootable macOS USB installer instead. To create a bootable macOS 10.13 USB installer, you will generally need a Mac from Late-2009 to 2018. For creating a macOS 13.x USB installer you generally need a Mac from 2017 to 2023. You can use the information in this article to determine which versions of macOS are compatible with various Apple hardware to determine a Qualifying Mac for creating a specific macOS USB installer:
https://eshop.macsales.com/guides/Mac_OS_X_Compatibility
Why are you reinstalling macOS? If it is to solve an issue, then perhaps that issue is the same one causing problems with reinstalling macOS.
Ok thanks.. I got here:
But wifi is powered off and its not turning on.. progress was here and after 10 mins still same.. nothing is happening.. what should I do now? Any suggestions pls?
Thank you for the suggestion but I gave it a try but its still saying to install Siera like before and same error exists. Any other solution pls!?
Recovery server is damaged, untrusted certificate title.
