Photoshop Won’t Open on Sierra and How to Fix

photoshop won't open

Designers and Photographers Need Fix for Photoshop Won't Open Error on macOS Sierra and High Sierra

Beginning in 2016, designers and Adobe Photoshop users reported error messages when they attempted to run the Photoshop program. Most users reported a pop-up sign indicating Mac, “Could not complete your request because of a program error.” Frustrating! Especially if Photoshop is part of your daily routine and/or livelihood.

Save space on your HDD with CleanMyMac 2!

Here's How to Fix It When Photoshop Won't Open on Sierra:

Reinstall Photoshop

To do this we recommend using the CleanMyMac 3 Uninstaller tool. Here are the steps:

  • Launch CleanMyMac 3 (you can download it for a free trial!)
  • Choose Uninstaller
  • Find Photoshop and click "Complete Uninstall"
  • Return to Adobe Creative Cloud
  • Run a complete installation of Photoshop
  • Note: you need to have your Creative Cloud login or your Photoshop license key handy to restart the program

Now, you should be able to open the program without error.

Reinstall High Sierra

If a reinstall of Adobe Photoshop doesn't fix your error message, you need to consider a reinstall of macOS High Sierra.

Here's the steps you need to reinstall High Sierra:

Critical: Back up your Mac using Time Machine or an external hard drive before you begin!

  • Click your Apple icon in the top left corner of your screen and select Restart
  • Hold down Command + R keys (you’ll see the macOS Utilities window)
  • Choose Reinstall MacOS
  • Select Continue
  • Select your hard drive (this is usually Macintosh HD)
  • Click Install

photoshop won't open

Did it work? Tell us if you're still stuck!


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About the Author
Kylie Larson is a content wrangler, helping both small businesses and large organizations get their message up and out. When she's not writing and organizing online, you'll find her walking the dog, with a camera in hand, riding the Chicago blue line, and in the midst of a home renovation project that never ends. Connect with her at

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