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macOS unable to open any non-Apple application

(twitter.com)
2603 points mattsolle | 1 comments | 12 Nov 20 21:00 UTC | HN request time: 0.35s | source
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submeta ◴[12 Nov 20 21:15 UTC] No.25075156[source]▶
Unbelievable. When I read the tweet (tried to post here as well), I suddenly realized why my Mac was unresponsive an hour ago.

Here is another tweet that describes the problem in more detail:

https://mobile.twitter.com/llanga/status/1326989724704268289

> I am currently unable to work because macOS sends hashes of every opened executable to some server of theirs and when `trustd` and `syspolicyd` are unable to do so, the entire operating system grinds to a halt.

EDIT:

As others pointed out, I put this to my `/etc/hosts` file and refreshed it like so:

    sudo emacs /etc/hosts # add `0.0.0.0 ocsp.apple.com` 
    sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder # refresh hosts
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vsskanth ◴[12 Nov 20 21:30 UTC] No.25075338[source]▶
Can apple not use security certificates to verify publishers ? why does it need to go to their servers ?
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loeg ◴[12 Nov 20 22:04 UTC] No.25075733[source]▶
The URL mentioned in sibling comments suggests this has to do with certificate revocation (OCSP): https://en.wikipedia.org/wiki/Online_Certificate_Status_Prot...

I agree that breaking system availability when an OCSP server isn't available is user-hostile and unnecessary.

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1. jrochkind1 ◴[12 Nov 20 22:59 UTC] No.25076418[source]▶
> I agree that breaking system availability when an OCSP server isn't available is user-hostile and unnecessary.

Based on the OP tweet... depending on the way it is unavailable, the failure is indeed ignored in some cases. "Denying that connection fixes it, because OCSP is a soft failure (Disconnect internet also fixes.)"

So it may be an actual unintended bug that a particular failure path results in a DoS instead?