Catalina installation error
Hello,
Imac 2017 27' Catalina installation error,
storage error (-69716),
what to do,
thanks in advance
Julius
“I don’t need mac to have windows’ problems”
Question marked as
Great question, now you have a few tools to help you, but it is somewhat a technical verification; but easy enough for most if you go slowly!
First, this specific error (during MacOS install) is most usually in relation to the "quality" of you MacOS partition. Simply, your Mac paritition has errors and sometimes it may be recoverable... Let's check this now.
1 - Boot your Mac in Recovery Mode (hold together on your keyboard -> command + R).
2 - Once loaded -> give it a moment or so, go into Disk Utility app -> you should see a menu with 4 options including reinstall your OS, get help, etc.
3 - Once in the App, you will see the drives you have on your Mac. Make sure you select the drive that holds your main paritition (usually on the top left menu). That's usually where you want to install you OS. Now in the sidebar, select the volume you wish to repair.
4 - Click the First Aid button -> Click Repair Disk.
Now if nothing seems to work (and you still get errors), you may have to recovery a broken partition using Internet Recovery or a Time Machine backup. Now that's another subject!
Respect.
Here's a great web site for futur reference : https://www.idownloadblog.com/2016/02/26/how-to-use-disk-utility-in-mac-recovery-mode/
40 replies
Must be a different issue 'cos it worked for me.
Time not wasted.
Thanks JAA for the tip.
I have same issue and run repair disk from recover mode with no error then perform the OS update again but unfortunately the issue is same.
Have the same issue on iMac (Retina 5K, 27-inch, Late 2015) with 2TB Fusion. 🥺
I have the same install error, on a late 2013 27inch iMac with a 3 TB fusion drive.
Same uses issue!
Firstly, make yourself a Catalina installation USB device. There are lots of instructions for doing this but this article is quite thorough. Also, make sure you got multiple backups of your data from the Mojave disk before you start.
Boot the Mac holding down the option key and select the install Catalina USB device. Then use the version of Disk Utility that comes with Catalina. (Note: I had errors on my iMac's Fusion drive that previous versions of Disk Utility could not fix, but the Catalina version worked. I guess Apple have made improvements to recovering APFS errors.) Selecting the 'all devices' menu option allows you to see the container that you need to 'erase'. Look at the log of what it is doing when erasing the container and you will see that it is creating various volumes that are needed by Catalina. Older versions of Disk Utility didn't do this.
Once you've created the volumes, go ahead and run First Aid on everything just to be sure you've got a clean disk. Then quit out of Disk Utility and start the Catalina installation. Finally recover your data from one of your backups.
This worked for me.
This approach worked for me after multiple passes with the other ones didn't, on a 2019 iMac..
The "needed to recreate the fusion drive from the recovery terminal" hint made me Google that, finding the matching Apple article:
https://support.apple.com/en-us/HT207584
I rebooted in "remote-rebuild" mode with the OPTION-COMMAND-R combination, this allowed my iMac to download the Catalina installer directly from Apple, then used the Terminal menu and issue the command:
diskutil resetFusion
This step was able to resolve all the issues with my Fusion drive (obviously by also removing all its content as it is re-created from scratch).
Exiting the Terminal, and using the re-install OS option allowed Catalina to finally install smoothly.
Fusion drives can be tricky to handle even for the OS itself..
Restart the SMC and NVRAM with the Mac powered off press Option + Command + P + R, let's restart for like 2 or 3 times and try to install Catalina Again.
If that doesn't work
Start over again pressing Shift +Command + Option + R, and delete all the volume, create a partition Mac OS Extended and install the version coming with your Mac, then Update + Update + Update to get Catalina
Same issues.
Catalina installation error