Final answer:
To check if Appium is installed on a Mac, open the Terminal application and type 'appium-doctor'. If Appium is installed, you will see a message indicating that it is correctly installed. If not, you can install it using Homebrew.
Step-by-step explanation:
Appium is a mobile automation testing tool which is used to automate mobile applications on different mobile operating systems such as Android and iOS. It is an open source tool which can be used to automate the testing of different mobile device applications such as native, WAP and hybrid application.
To check if Appium is installed on a Mac, you can follow these steps: Open the Terminal application on your Mac. Type 'appium-doctor' and press enter. The Terminal will display the status of your Appium installation. If Appium is installed, you will see a message indicating that it is correctly installed. If Appium is not installed, you can install it using a package manager like Homebrew. Open the Terminal and type 'brew install appium' to install Appium. After installation, you can use the 'appium-doctor' command to verify the installation.