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Question: macOS High Sierra - all documents damaged after migration from another mac

I've migrated just about everything from my MacBook Pro running Sierra to another MacBook Pro running High Sierra upgraded from a clean El Capitan.

As a result - all my (migrated) documents, as well as newly downloaded ones, when I try to open any of them - are reported as damaged and should be moved to trash(!?)

User uploaded file

Actually - the problem happens even with the brand new file I've just created:

User uploaded file

I understood that this has to do with SecAssessment system policy security (spctl), and disabling it actually helps, but I think there is a point to having it enabled, and it should make sense somehow rather than declaring all my content - damaged.

MacBook Pro, macOS High Sierra (10.13.1), 13" mid-2012

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Nov 14, 2017 2:32 PM in response to vladimir136 In response to vladimir136

It turns out that all my files get quarantined for some reason.

I've simply run `sudo xattr -dr com.apple.quarantine . ` in my home dir in order to clear the attribute on my old stuff. However, newly created or downloaded stuff keeps getting com.apple.quarantine attribute - perfectly annoying!

Nov 14, 2017 2:32 PM

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Nov 18, 2017 7:05 AM in response to vladimir136 In response to vladimir136

Also tried clean High Sierra install. After starting migration assistant directly from installation - I get the same result.
Now, tried creating an account in High Sierra, and it doesn't complain about the new docs, so now I'm pretty sure that migration is somehow messing it up. I was migrating everything - accounts, apps, and settings. Will try to skip settings, as perhaps some of those are not properly translated to the new OS.

Nov 18, 2017 7:05 AM

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Question: macOS High Sierra - all documents damaged after migration from another mac