# Introduction

## The Situation:

You just poured a ton of time into your *Heccintosh 2900* and got most things running like butter; *"Time to back this up"* you think as you reach for your USB 3 external hard drive... The USB cable seats snugly in the port as the your eyes watch the desktop... but... *nothing shows up*.

*"Where is my drive??"*

It turns out, you've been hit by a common problem - macOS is limiting the number of USB ports you can use!

## In This Guide:

There are two major parts to this:

1. An extensive background on what the issue is, why it happens, what our options are, how to accomplish those fixes, and how many apples you can fit in a bag.
2. A walkthrough for using the mostly-automated USBMap.command for setting up an SSDT that controls which ports you will use.

If you've gone through this all before and just want to use the script - skip ahead to the *USBMap Script* section.

For everyone else - just continue onto the next section and we'll dive right into some terms!