User profile for user: Ironman2909
Ironman2909 Author
User level: Level 1
6 points

Can't install sequoia 15.6, Error message during the install

Extremely frustrating! Having the same issues when I was trying to install OS 15.5 and had to force it through using the terminal. I have a Macbook Pro 2019 and I have over 500Gbs of free space. I must say that the issue is starting to get extremely frustrating and wondering if it's not the last apple computer I will buy......


Tried everything using the terminal. It seems the install is stuck at 65%. If I go in safe mode and I start the install and check the HD space available it's filled up leaving less than 130Mbs left..... feels like it's programmed obsolescence forced into a ''you can't update your laptop anymore, it's time for a new one"....


Shouldn't be that hard since the laptop is still listed on supported devices..... not sure what to do......

Posted on Aug 18, 2025 08:12 AM

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6 replies
User profile for user: den.thed
den.thed
User level: Level 10
88,780 points

Aug 18, 2025 08:38 AM in response to Ironman2909

Do you have any third-party Anti Virus, Protecting, Cleaning software or a VPN installed on that Mac...?

If so, those can hinder or block the update process.


1) Try starting up in Safe Mode and the see if you can update.

Start up your Mac in safe mode - Apple Support

2) If that doesn't help, try updating while in macOS Recovery Mode.

If an error occurred while updating or installing macOS - Apple Support


Additionally, EtreCheckPro is an excellent tool for finding and sorting out various problems.

Download and run the free version of EtreCheckPro, from > https://etrecheck.com/en/index.html

Then post back here with your Report, as per > How to use the Add Text Feature When Post… - Apple Community


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Can't install sequoia 15.6, Error message during the install

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