How to uninstall and re-install Appium

There are some cases we cannot define the rootcauses for iOS devices' issues. The best practice is to re-install Appium.

1. To know how the Appium was installed, run the command which appium.

Alternatively, you can navigate to Katalon Studio > Preferences > Preferences > Mobile > Appium Directory to check the current Appium path.

2. Depending on the Appium installation path, you can determine whether Appium was installed with Homebrew or NPM. From NPM:

   npm uninstall -g appium

   From Home Brew:

   brew uninstall appium

3. Reinstall Appium 3 by running these commands:

npm i --location=global appium@3.0.0
appium driver install xcuitest@7.21.1