Level 1

30 points

Mail cannot save information about your mailboxes because there isn't enough space in your home folder

Mail will not open since Catalina upgrade. Receive this message and I have tried all the older solutions with previous Mail OS update issues. This message pops up when attempting to import mail messages. "Mail cannot save information about your mailboxes because there isn't enough space in your home folder". Same message when I attempted the index fix from past. What is the current fix for this?

iMac Line (2012 and Later)

Posted on Oct 8, 2019 9:49 PM

Top-ranking reply

re5i5tor

Level 1

4 points

Posted on Jan 4, 2020 6:32 AM

Just a reminder / summary to all with this problem:

It is not a mail problem. It is an issue with a corrupt Fusion drive / APFS volume and therefore can impact any app.
The problem is apparently caused by the data migration process that happens during the Catalina upgrade, and can apparently also be triggered by running Migration Assistant.
Doing a complete Catalina fresh installation including resetting the Fusion drive (and avoiding running Migration Assistant) has apparently completely resolved the issue for everyone who was tried it, myself included.

Specifically these instructions:

Alright, these steps fixed my problems:

Create bootable USB with macOS 10.15.1 (or latest)
Restart Mac and press with Cmd + Option + R to start recovery mode
In recovery mode open Terminal and enter "diskutil resetfusion"
Install macOS

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Similar questions

151 replies

Nov 11, 2019 7:26 AM in response to miller_andy

I'm very sorry: 10.15.1. I'm still waiting for upgrade but now I'm downgrading to Mojave.

leex

Level 1

24 points

Nov 12, 2019 4:35 AM in response to cllivesey

That does not help me.

re5i5tor

Level 1

4 points

Nov 12, 2019 5:27 AM in response to Louis Van Proosdij

My iMac also has a Fusion drive so this is a possibility.

Do others with the problem have Fusion drives?

Erlacher

Level 1

9 points

Nov 12, 2019 5:48 AM in response to re5i5tor

Yes. Fusion Drive on iMac.

trex67

Level 1

26 points

Nov 12, 2019 11:54 AM in response to macmarkup

2015 iMac, Fusion drive.

Nov 12, 2019 6:07 PM in response to re5i5tor

Is it solved the issue?

Nov 13, 2019 11:49 AM in response to b862

I am not on a fusion drive - but upgraded to a single 2TB SSD last year - I get the same error message. APFS Volume with 600Gb+ free....super annoying...my MacBook Pro 2016 has no issues.

Nov 19, 2019 5:44 PM in response to re5i5tor

Yes - I did this - my mac was pretending I had a fusion drive even though it was two SSDs - super annoying - I did this diskutil resetfusion above and it worked like a charm

Nov 28, 2019 2:43 PM in response to MadcapIdea

I "resolved" the issue by using Spark instead of Mail. However the Mac ist still failing from time to time and get's really slow. Hope desperately for another update.

leex

Level 1

24 points

Dec 5, 2019 2:58 AM in response to leex

Dec 10, 2019 7:45 PM in response to b862

Apple's just come out with Catalina 10.15.2 and it hasn't solved a thing. Apple has been very disappointing recently.

Dec 13, 2019 12:55 PM in response to re5i5tor

Hi, I saw that you posted that everything worked fine on 29 Nov. Is this still the case? Thanks.

Dec 13, 2019 12:56 PM in response to chaddizzar

Well.... issues came back again.... re5i5tor, is your system still working fine?

Gjsgjs

Level 1

12 points

Dec 17, 2019 7:26 AM in response to re5i5tor

Is Apple working on a fix for this issue?

Dec 18, 2019 2:43 PM in response to MadcapIdea

Deleting the "Envelope Index" didn't help me.

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Mail cannot save information about your mailboxes because there isn't enough space in your home folder