How to secure and lock down Apple OS X 10.11 (El Capitan) with osxlockdown

To secure and lock down an Apple OS X 10.11 (El Capitan) system with the osxlockdown tool, you can follow these steps:

1. Install the osxlockdown tool. You can download the osxlockdown tool from the following website:

https://github.com/securemacprogram/osxlockdown

Once you have downloaded the osxlockdown tool, you can install it by following the instructions provided on the website.

2. Run the osxlockdown tool. You can run the osxlockdown tool by typing the following command in a terminal window:

osxlockdown

This will run the osxlockdown tool and display a menu of options.

3. Select the options you want to enable. The osxlockdown tool provides a number of options for securing and locking down an OS X system. You can select the options you want to enable by typing the corresponding number and pressing Enter.

For example, to enable the option to disable external booting, you can type 1 and press Enter.

4. Restart the system. After you have selected the options you want to enable, you will need to restart the system for the changes to take effect. To restart the system, you can use the shutdown command like this:

shutdown -r now

This will restart the system immediately.

Keep in mind that the osxlockdown tool is a third-party tool and is not affiliated with Apple. Use the tool at your own risk, and be sure to read and understand the documentation before using it.