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Yesterday I restored a Time Machine backup and since then I can no longer open downloaded files. I get a message that the file is damaged and needs to be moved to the trash. It happens with all kinds of files (PDF, dmg and other). I tried to start up in the safe mode, but that did not help. I see that more people have the same problem, but I have not found a solution yet. How do I resolve this problem
iMac 27″, macOS 10.15
The Issue as per the much appreciated Screen Shot above it that the internal drive CT1000MX500SSD is in GUID Journaled. Guessing this was done when it was Restored from the Time Machine Backup.
Catalina requires the Internal Drive to be formatted as APFS and not GUID. That would mean drive CT1000MX500SSD needs to be Wiped - ALL content will be lost. Then Reformatted as APFS with Scheme GUID Partition Map and only then everything reinstalled.
The Issue as per the much appreciated Screen Shot above it that the internal drive CT1000MX500SSD is in GUID Journaled. Guessing this was done when it was Restored from the Time Machine Backup.
Catalina requires the Internal Drive to be formatted as APFS and not GUID. That would mean drive CT1000MX500SSD needs to be Wiped - ALL content will be lost. Then Reformatted as APFS with Scheme GUID Partition Map and only then everything reinstalled.
Thanks again. I tried this a dozen times, but it did not resolve the problem either.
This is what my directory looks like:
When I try to run the First Aid on the CT1000MX500SSD in safe mode, I get an error: there are some problems with the partition layout... Disk cannot be activated. I can run First Aid on this disk in normal mode without error.
This is what the Conatiner disk1 looks like:
When I run the First Aid on the Container disk1, I get several errors on the different snapshots. At the end it says:
Performing deferred repairs
error: nchildren of inode object (id1310819) does not match expected value (1)
Deferred reparis failed
The volume /dev/disk0s2 could not be verified completely.
I tried this (for Macintosh HD and Macintosh HD - Data) but it did not solve the issue. This is the information I got from the Macintosh HD - Data section:
Performing deferred repairs.
error: Unable to perform deferred repairs without full space verification
error: Try running fsck against the entire APFS container instead of a volume
The volume /dev/rdisk1s1 could not be verified completely.
I assume that this causes the problem, but I still don't know how to fix it.
In Recovery Mode again >> Disk Utilities >> View >> Show all connected devices >> Choose the Upper Most Drive usually called Apple xxx and Not the volumes indented and below. Run Disk Repair again and as many times until No Error messages in the Results box below it
Restart in Safe Mode >> Utilities and run Repair Disk. Restart and try opening the offending files and see if this resolves the issue
Unable to open downloaded files
