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11.6 failed to personalize error

Hello. I'm trying to update to 11.6 from 11.5.2 on an M1 iMac and having some issues. First, I have to mention that my internet connection is very slow (1Mb/s) and unreliable (satellite system, connection is lost when it rains). Nevertheless, I managed to download the update patch twice before but recieved "failed to personalize the software update" error at the end of both downloads. Now I'm trying to download it a third time. My questions are:


1) I'm hoping that this is an unreliable connection/busy Apple server issue. If so, do I need to clear a download cache or something before starting a new download?

2) Software Update reports that the download size is 3.54GB. Is it normal on an M1 iMac?

3) I've also found a direct link to full installer of 11.6. It's thankfully resumable but its size is more than 12GB. If I download and install this, will it be an update or will it be a clean install, deleting all my applications?


Thank you in advance.

iMac 24″, macOS 11.5

Posted on Sep 21, 2021 2:20 AM

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10 replies

Sep 21, 2021 6:03 AM in response to volk65

volk65 wrote:
11.6 failed to personalize error
Hello. I'm trying to update to 11.6 from 11.5.2 on an M1 iMac and having some issues. First, I have to mention that my internet connection is very slow (1Mb/s) and unreliable (satellite system, connection is lost when it rains). Nevertheless, I managed to download the update patch twice before but recieved "failed to personalize the software update" error at the end of both downloads. Now I'm trying to download it a third time. My questions are:

1) I'm hoping that this is an unreliable connection/busy Apple server issue. If so, do I need to clear a download cache or something before starting a new download?
2) Software Update reports that the download size is 3.54GB. Is it normal on an M1 iMac?
3) I've also found a direct link to full installer of 11.6. It's thankfully resumable but its size is more than 12GB. If I download and install this, will it be an update or will it be a clean install, deleting all my applications?

Thank you in advance.



If you get a personalization error when reinstalling macOS on your Mac with Apple M1 chip

https://support.apple.com/en-us/HT211983

Sep 21, 2021 6:44 AM in response to volk65

If successful in getting the Full Installer of 11.6 - option to Create a Bootable Installer



The below is an option But - will wipe the entire drive and all content - there are not do overs - period.


To perform this action will require booting from a Bootable Installer. This will have to be performed from a Qualifying Computer to run the version of macOS to be made on the Bootable Installer. Example : Bootable Installer of Big Sur would have to be done on a computer that Qualifies to run Big Sur.


Once that is done read on for preparing the Destination computer  >> Special Notation - works on Intel Based Apple Computers & on Apple Silicon M1 CPU


Extra Special Notation regarding the Touch ID equipped Apple Computer. About Startup Security Utility and Must Enable from Recovery Mode the ability to boot from External Drive Before Attempting 


1 - Shutdown computer and disconnect all external drive Except the newly created Bootable Installer.


2- Restart and immediately hold the OPTION key until the Startup Manager appears and choose the USB Drive. 


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


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


5 - 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. 


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


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


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

Sep 21, 2021 4:12 AM in response to PRP_53

Nope, diplomat family in Cuba. Normally Apple blocks connections from Cuba but as we use HughesNet's system, we appear to be connected within US. On the 25th of each month, Hughenet provides 20 MB/s speed for 21GB of download, then throttles it back to 1MB/s. If all fails, I will wait for the 25th. Thank you.

Sep 21, 2021 5:19 AM in response to PRP_53

Yes, 24" M1 unit. As for the full installer 11.6, search the words "direct download 11.6 full installer". The first Google Search link gives direct download links to Apple's SWCDN servers. There is even a link for IPSW file (for Apple Silicon Macs, to be used with a second Mac and Apple Configurator).

11.6 failed to personalize error

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