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User profile for user: Zaghloul
Zaghloul Author
User level: Level 1
32 points

Keychain problem after crash?

Since updating my 2017 MacBook Pro (16 GB RAM, 2.5 GHz dual-core i7) for the supplemental update to OS X 10.15.4, it has been very unstable, crashing continually, sometimes on start up.


I tried using DiskUtility to do first-aid on the (SSD) hard drive in recovery mode, but that failed. Still, finally it was able to complete a full Time Machine backup last night, and today the computer had a good day: no crashes, fan quiet, peppy, no error messages. So I thought I would risk opening Ableton. This crashed it again.


Now whenever I log in, I get a white screen and an alert saying the computer crashed and do I want to reopen windows, though I shut the computer down myself. The next thing that happens is I get the following messages:


Unrecoverable error. Security Agent was unable to create requested mechanism loginKC.queryCreate


sharingd wants access to the keychain (this goes away when I put in the admin password)


callserviced wants to use keychain (this also accepts the admin password)


I also get an alert saying the Mac cannot connect to iCloud because of a problem with my username. But if I sign in again through the Apple ID preferences pane, I get "an unknown error occurred."


Keychain Access shows empty keychains for login, system, and System Roots. The iCloud passwords are there.


I believe this might have something to do with why I can no longer open any Apple software: Safari, Mail, Stickies, Music, Notes, etc --- all crash immediately after I try to open them. Utilities like Activity Monitor and Keychain Access work. And most third-party software seems to work (I'm not trying to open Ableton again, but I'm writing this on Firefox, for example, and that is fine). The LastPass app crashes like an Apple app. Interestingly (maybe), the Signal desktop app, still works.


Any ideas what might be going on? Any ideas how to fix it?


I didn't experience problems with 10.15.4 until the supplemental update.


I would be very grateful for any help fixing this.

MacBook Pro 13", macOS 10.15

Posted on Apr 12, 2020 8:25 PM

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User profile for user: Kappy
Kappy
User level: Level 10
361,831 points

Posted on Apr 12, 2020 8:42 PM

I suggest the following:


Install El Capitan or Later from Scratch


If possible, back up your files.


  1. Restart the computer. Immediately, at or before the chime, hold down the Command and R keys until the Apple logo and progress bar appear. Wait until the Utility Menu appears.
  2. Select Disk Utility from the Utility Menu and click on the Continue button.
  3. When Disk Utility loads select the target volume (indented entry, usually Macintosh HD) from the Device list.
  4. Click on the Erase button in Disk Utility's toolbar. A panel will drop down.
  5. Set the Format type to APFS (SSDs, only when installing Mojave or Catalina) or Mac OS Extended (Journaled.)
  6. Click on the Apply button, then wait for the Done button to activate and click on it.
  7. Quit Disk Utility and return to the Utility Menu.
  8. Select Install OS X and click on the Continue button.


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User profile for user: Kappy
Kappy
User level: Level 10
361,831 points

Apr 12, 2020 8:42 PM in response to Zaghloul

I suggest the following:


Install El Capitan or Later from Scratch


If possible, back up your files.


  1. Restart the computer. Immediately, at or before the chime, hold down the Command and R keys until the Apple logo and progress bar appear. Wait until the Utility Menu appears.
  2. Select Disk Utility from the Utility Menu and click on the Continue button.
  3. When Disk Utility loads select the target volume (indented entry, usually Macintosh HD) from the Device list.
  4. Click on the Erase button in Disk Utility's toolbar. A panel will drop down.
  5. Set the Format type to APFS (SSDs, only when installing Mojave or Catalina) or Mac OS Extended (Journaled.)
  6. Click on the Apply button, then wait for the Done button to activate and click on it.
  7. Quit Disk Utility and return to the Utility Menu.
  8. Select Install OS X and click on the Continue button.


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Keychain problem after crash?

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