I noticed that you mentioned 'instal' instead of 'install'. I'll assume you meant to ask me how to install something.

Based on your text, I see that you're interested in installing a few different things:

1. ZZT: You want to know more about the game ZZT and how to play it.

2. macOS: You mentioned installing a new version of macOS (Mojave) or using startup key combinations.

3. Font: You want to install a new font on your Mac.

4. Windows 10: You asked how to install Windows 10 from a USB drive.

Let me help you with each of these requests:

ZZT: ZZT is an action-adventure puzzle game developed for MS-DOS in 1991. The game has been praised for its challenging puzzles and addictive gameplay. If you're interested in playing ZZT, I can provide more information on how to install it.

macOS installation: To install a new version of macOS (such as Mojave), you'll need to erase your hard drive and reinstall the operating system. This process will delete all your files and data, so be sure to back up your important files before proceeding.

To use startup key combinations on your Mac, follow these steps:

* Press and release the power button.

* Immediately after releasing the power button, press and hold one of the following key combinations:

+ Command-R: Boots into macOS Recovery.

+ Option-Command-R: Boots into Internet Recovery (if available).

+ Shift-Option-Command-R: Boots into a different language or keyboard layout.

Font installation: To install a new font on your Mac, follow these steps:

1. Download the font file (.ttf or .otf) to your computer.

2. Double-click the font file to open it in Font Book (a built-in macOS application).

3. Click 'Install Font' to add the font to your system.

Windows 10 installation: To install Windows 10 from a USB drive, follow these steps:

1. Run MediaCreationTool20H2.exe on your computer.

2. Choose 'Create installation media' and select the USB drive (with at least 8GB of free space).

3. Follow the prompts to transfer the installation files to the USB drive.

That's it! I hope this helps you with your requests.

Instal the new for mac ZZT!