Was Your Mac Slow on Thursday? Apple's OCSP Server Was Likely the Cause

On Thursday, October 12th, right around 3:30pm EST, Apple’s OCSP server stopped responding. On the surface that doesn’t sound like much, but when you stop and realize this is the server responsible for authenticating the certificates at the core of all your apps, it starts to matter.

And matter it did! For about an hour yesterday, Mac apps wouldn’t launch (or would launch slowly), rebooting was super-slow (for the same reason), and even Zoom connections took minutes to connect.