You mentioned troubleshooting, did it include these:
![Startup disk for macbook pro Startup disk for macbook pro](/uploads/1/1/4/0/114054173/575298558.jpg)
NVRAM reset
A boot disk (or a startup disk) is a recovery media (CD, DVD or floppy disk for older Windows versions) that you can use to start Windows, if it became damaged or corrupted somehow. The term “boot disk” was mostly used in connection with Windows XP (and older versions) and, in some cases, with Windows Vista. Update: Apple appears to have recently made this process easier: If you previously purchased Lion from the Mac App Store, the button next to Lion in the Store should simply say Download—click it. Apple also offers Shift-Command-Option-R, which installs the version of OS X or macOS with which your computer shipped, or the next oldest compatible system still available for download.
Download Startup Disk For Macbook Protection
Shut down the MacBook Pro. Start it and immediately hold down Command, Option, P and R keys at the same time. Wait until you hear the startup chime for the third time before letting go.
![Create macbook pro startup disk Create macbook pro startup disk](/uploads/1/1/4/0/114054173/822176597.png)
Also, SMC reset may be needed (that usually doesn't fix a missing boot partition, though).
- Shut down the computer.
- Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
- On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
- Release all the keys and the power button at the same time.
- Press the power button to turn on the computer.
Restart and hold down the D key to enter the Hardware Test. Follow the instructions.
When booted externally, use Finder's Go menu to open Utilities. Launch Disk Utility and look for any signs of your internal drive in the list of hard drives on the left. If you find it look for First Aid and try to use it on the disk.
Refer to the following to see if it takes you anywhere you haven't been yet.
Download Startup Disk For Macbook Pro 2017
Feb 10, 2017 3:37 PM