How do you obtain a tcsh shell login on mac?

To obtain a tcsh shell login on a Mac, you can follow these steps:

1. Open the Terminal application: You can find Terminal in the "Utilities" folder, which is located within the "Applications" folder.

2. Launch the Terminal: Double-click on the Terminal icon to open it.

3. Check the current shell: In the Terminal, type the following command and press Enter:
```
echo $SHELL
```
This will display the current shell being used.

4. Change the shell to tcsh: If the current shell is not tcsh, you can change it to tcsh by running the following command in the Terminal:
```
chsh -s /bin/tcsh
```
You will be prompted to enter your password. Note that you need administrative privileges to change the shell.

5. Log out and log in again: After changing the shell, it is required to log out and log back in to activate the changes. You can either restart your Mac or simply log out of your current user account and then log back in.

6. Verify the shell change: Once you are logged back in, open the Terminal again and check the current shell by executing the command:
```
echo $SHELL
```
It should now display `/bin/tcsh`, confirming that you have successfully obtained a tcsh shell login.

Now you can use tcsh as your default shell on your Mac.