After I upgraded my Mac OS to 10.15.6, Appium's WebDriverAgent agent no longer opens my iPhone app under test

After I upgraded my Mac OS to 10.15.6, Appium’s WebDriverAgent agent no longer opens my iPhone app under test. My Xcode was updated to 12 so I dropped back to 11.7. Here are the details:

  1. Open Appium 1.17.1
  2. Open Xcode 11.7 simulator for iPhone X with os 12.2
  3. Click Start
  4. Click the magnifying glass
  5. Navigate to saved capabilities
  6. Click start session

Results: The app undet test installs
WebDriverAgent install repeatidy
WebDriverAgent uninstalls

Expected Results: The app installs
WebDriverAgent installs
The app opens

Here is the relevant error message:
[WD Proxy] Got response with unknown status: {“errno”:“ECONNREFUSED”,“code”:“ECONNREFUSED”,“syscall”:“connect”,“address”:“127.0.0.1”,“port”:8100}
[WebDriverAgent] WDA is not listening at ‘http://127.0.0.1:8100/
[WebDriverAgent] WDA is currently not running. There is nothing to cache

Did you open xCode after update? It is needed to update it tools. Also try uninstall and install appium.

Thanks, @Aleksei . You’re suggestions are perfect as usual! It is fixed. (after 100 other attempts :wink:

The Fix: I uninstalled all versions of appium, and xcode, and installed xcode 11.6 and appium 1.18.0. Yes, I opened Xcode and rebuilt the app.