my photos won't show full screen

nfromduffy Said:

"my photos won't show full screen: thank you for your help. I have tried A and B but as a newbee I don't want to go to C as I don't really know enough about the iMac yet. Strange thing is Full Screen works in other apps but not in Photos. Oh well I'll keep trying. Thanks again, Don."

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You are welcome.

Two Other Thoughts...

• Try a New Admin User:

What happens when you create a new administrator user, and log int it? Do you still get this error? If not, then it is likely an error with the current user. If so, then it is likely an error with your macOS.

• Reinstall the macOS:

Nothing would be lost. It's just that dislocated items would be placed back to where they should be and corrupt system files would be replaced by clean files. Go Here: Reinstall macOS - Apple Support. IMPORTANT: Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with the reinstall. Learn More Here: How to Reinstall macOS from macOS Recovery - Apple Support

nfromduffy Said:

"my photos won't show full screen: Sorry, I am very new to the Mac system. I am in fact asking about my iMac 24. Up until yesterday I could just click the green button and the photos would show in full screen. Today nothing happens. Could I have done something accidentally? Thanks or any help"

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No need to Apologize :)

Double-Click in Photos:

No so certain about this "green button" you are referring to. But, open the Photos app, and then double-click on the photo. In doing so, then photo opens in full-screen.

donfromduffy Said:

"[....]perhaps I should do a recovery from yesterdays backup? Any thoughts would be appreciated from Canberra Australia."

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Troubleshooting a Maximizing a Window:

Being continuous, it seems there is an error in the system caches. So, refer to the following...

Three Things to Try...

A. Start with a Restart:

Restart your Mac, and see if it then is fixed.

B. Refresh Finder:

1. Go To: Apple menu
2. Select: Force Quit...
3. Select: Finder
4. Click: Refresh button

C. Boot in Safe Mode:

In Safe Mode, Login Items do not run at login, certain preferences are set aside, and damaged system files are then reset. So, once booted in to Safe Mode, wait 30 seconds, and then boot up normally, attempting another update install. For instructions, go here: How to Use Safe Mode on your Mac - Apple Support

nfromduffy Said:

"my photos won't show full screen"

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What is your device? You've poses this in the Photos for iOS forum, yet the device you've provided is an iMac 24"

If an iPhone: Put two fingers on the screen where the photo is, and then swipe them apart.

nfromduffy Said:

"my photos won't show full screen: thanks for trying. A friend dropped by and we worked out that it something to do with shared library. I turned that off and touch wood full screen is working again.Phew!!"

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You are welcome.

Thank you for the update.

Please Provide the Fix:

Can you provide the steps to fixing this? That would most certain help others reading this.

Report this to Apple:

Do your Part: Inform Apple of your feedback of this issue. Include how you’ve troubleshot this, and your results. Apple wont get back to you directly, but the more feedback they receive from its users, the more likely they will know what bug exist, and what fixes need to be included in future macOS versions to come.

1. Go Here: Feedback - macOS - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Select: "User Interface" for the "Feedback Area"
4. Comment: on when this all began, and how you have troubleshot it thus far. Include the URL of this thread.
5. Proceed from there as necessary

nfromduffy Said:

"my photos won't show full screen: thank you for your help. I have tried A and B but as a newbee I don't want to go to C as I don't really know enough about the iMac yet. Strange thing is Full Screen works in other apps but not in Photos. Oh well I'll keep trying. Thanks again, Don."

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You are welcome.

Contact Apple Support:

If this is a bit too technical, then contact Apple Support, requesting assistance with this.

Apple Support Contact Us Info:

• Contact Us - Choose Locations
• Proceed from there as Necessary
• Why the Wait: Phone calls are taking a bit to go through at the moment, due to lots of calls. With the Coronavirus Pandemic, many are at home at the moment, with much time on their hands to contact Apple. So, just stay on the line, and you will get through :)

Screenshare with the Apple Rep:

To easily show the Apple Rep what is going on here, request a prompt for a screensharing session with the Apple Rep. That will allow them to see this firsthand, and upfront. Show this user through screensharing your Mac. Show them any paperwork or hover over something, through screensharing your iPhone.

Learn More at

My User Tips: 

• iPhone: Screenshare your iPhone with the Camera App Enabled to Easily Converse Over-the-Phone with Apple Support - User Tip
• Mac: Screensharing MacOS FaceTime to Easily Converse Over-the-Phone with Apple Support - User Tip