How to delay Sleep on MacBook?

How to Turn Off Sleep Mode on a Mac

Your Mac computer is set to go to sleep after a certain amount of time in order to help conserve power or your laptop’s batteries. However, it can be annoying if your computer is going to sleep when you don’t want it to. Here’s how to turn off sleep mode on a Mac using System Preferences and keep it awake with third-party apps.

How to Turn Off Sleep Mode on a Mac Using System Preferences

To turn off sleep mode on a Mac, go to System Preferences > Energy Saver. Then tick the box next to Prevent computer from sleeping automatically when the display is off and drag the Turn display off after slider to Never.

1. Open the Apple menu. You can do this by clicking the Apple icon in the top-left corner of your screen.
2. Then select System Preferences.
3. 
4. Next, select Energy Saver. This is the icon that looks like a light bulb.
5. 
6. Tick the box next to Prevent computer from sleeping automatically when the display is off.
7. Then untick the box next to Put hard disks to sleep when possible. 
8. Finally, drag the Turn display off after slider to Never.

Note: If you are using a laptop, you will only see this option if you click the Power Adapter tab at the top of the window. You can also change these settings in the Battery tab as well.

Download Jiggler: http://www.sticksoftware.com/software/Jiggler.html

It will "jiggle" the mouse to keep your computer awake. You can set it to auto-quit after a couple of hours.