If the problem still occurs, quit PowerPoint, and restore the file to its original location. Then, go to the next step. If the problem seems to be resolved, you can move the com.microsoft.powerpoint.plist file to the trash. Quit all Microsoft Office for Mac applications. On the Go menu, click Home. Update Office from the Mac App Store. If you downloaded Office from the Mac App Store, and have automatic updates turned on, your apps will update automatically. But you can also manually download the updates: Open the Mac App Store from your Dock or Finder.
Possible Fixes for High Sierra
Download Microsoft PowerPoint for macOS 10.14 or later and enjoy it on your Mac. This application requires a qualifying Microsoft 365 subscription. Microsoft 365 includes premium Word, Excel, and PowerPoint apps, 1 TB cloud storage in OneDrive, advanced security, and more, all in one convenient subscription. To recover PowerPoint file that not saved on mac or lost for unknown reason, there are 6 ways, no matter you want to recover unsaved or deleted PowerPoint on mac in Office 2011, 2016 or 2018. Also, to cover all the topics about PowerPoint recovery on mac, we include the solutions to recover previous version of PowerPoint on mac in case of needs.

You should try each, one at a time, then test to see if the problem is fixed before going on to the next.
Be sure to backup your files before proceeding if possible.
Mac Powerpoint Free
- Shutdown the computer, wait 30 seconds, restart the computer.
- Start the computer in Safe Mode, then restart normally. This is slower than a standard startup.
- Repair the disk by booting from the Recovery HD. Immediately after the chime hold down the Command and R keys until the Utility Menu appears. Choose Disk Utility and click on the Continue button. Select the indented (usually, Macintosh HD) volume entry from the side list. Click on the First Aid button in the toolbar. Wait for the Done button to appear. Quit Disk Utility and return to the Utility Menu. Restart the computer from the Apple Menu.
- Create a New User Account Open Users & Groups preferences. Click on the lock icon and enter your Admin password when prompted. On the left under Current User click on the Add [+] button under Login Options. Setup a new Admin user account. Upon completion log out of your current account then log into the new account. If your problems cease, then consider switching to the new account and transferring your files to it - Transferring files from one User Account to another.
- Reinstall OS X by booting from the Recovery HD using the Command and R keys. When the Utility Menu appears select Reinstall OS X then click on the Continue button.
- Erase and Install OS X Restart the computer. Immediately after the chime hold down the CommandandRkeys until the Apple logo appears. When the Utility Menu appears:
Keynote For Mac
- Select Disk Utility from the Utility Menu and click on Continue button.
- When Disk Utility loads select the drive (out-dented entry) from the Device list.
- Click on the Erase icon in Disk Utility's toolbar. A panel will drop down.
- Set the Format type to Mac OS Extended (Journaled.)
- Click on the Apply button, then wait for the Done button to activate and click on it.
- Quit Disk Utility and return to the Utility Menu.
- Select Install OS X and click on the Continue button.

Powerpoint For Mac Hangs Updating
Dec 3, 2017 7:25 PM