I have been staring the following to dialogs for about an hour:

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This problem does't only occur on one specific application. Instead, all applications seem to experiencing an infinite verification progress. What's wrong with my computer?

In fact, this issue emerges exactly after I upgrade my system. The current system version is OS X 10.11.4 (15E65) and here is the upgrades I've just installed:

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Thanks in advance.


Many times (not every time) this is because of a Keychain certificate/network issue. You can try turning off Certificates and see if this helps. After you do this, restart the MacBook, finish the installations, then turn Certificates back on.

Go to Keychain Access --> Preferences --> Certificates. See the image below.

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