Screen saver problem. Yosemite

CCan you please provide instructions on how to delete the Nat. Geo photos, and replace them with my own photos? I'm so fed up with this problem! Thank you!!

I first found the National Geographic folder by searching for it in Finder (Command F). The National Geographic folder was the first item in the list that pops up (if you click on the National Geographic folder in the finder results, at the bottom of that window it should say the Nat Geo folder is located in the Default Collections folder). Then I double clicked on the National Geographic folder itself, to open it, highlighted all the images within that folder, then dragged them to the Trash.

At that stage the computer asked for my Admin password, which I provided.

Next, I highlighted all the photos I wanted to use (about 250 of them) and dragged/copied them in the National Geographic folder, while also holding down the Option key, so they are copies. Again, the computer asked for my Admin password.

And that was it.

Back at the "Desktop and Screensaver" preferences pane, I then made sure the National Geographic folder was selected as the one I wanted to use. I also clicked the "Shuffle" option.

As a quick test run, I then set the screen saver to start working every 2 minutes, then over the next few minutes I noticed it worked well every time. Today (the day after the initial fix) the new screensaver is still working fine. I have now reset the screensaver back to chime in after 10 minutes, and it's still working fine. Hope this helps.

The problem seems to be that by default the plist file for ScreenSaverPhotoChooser always has the NatGeo path in it, regardless if you choose a different file path for it to use or not in System Preferences. When your screen saver loads in due to inactivity is converts this file (with your specific options that you've selected) as a temporary file and displays your pictures. When you wake up the computer (after any length) it removes the file it converted to a temporary file and replaces it with a blank ScreenSaverPhotoChooser, which then loads default values when your screen saver kicks on again.

Apple should be able to fix this by changing the code so it copies the file to a temporary file to load the screen saver, rather than renaming it.

*I should also note that sometimes it will replicate the settings you've saved, other times it will not. Though the replication isn't exactly how they are from when you've set them in system preferences.

To the original poster of this question: First off, thanks, because it's been driving me crazy too. Second, I think it would help if you could mark the reply that you originally thought had solved the problem as not solving the problem. And if the reply from D Hert seems to fix it, mark that one instead. Thanks

Sorry, I meant the reply from JamieJuno tho D Hert's were also helpful.

I tried JamieJuno's approach and was able to move the Nat Geo photos to the trash. However, when I tried to move my photos (from Photos) into that folder (whether trying one or thousands) I got this message: DSC_1283.JPG couldn't be copied because you don't have permission to access 1-National Geographic. If I tried moving them without holding down "Option," then I got the message: Could not write file to destination (1,016)

Any further advice?

Just replying to myself here... I think I finally got it to work. I thought that maybe the "1" in the National Geographic folder name was responsible for making it the default, so I changed the name of that folder to "5-National Geographic" and then created a new folder called "1-Family photos". Then I moved some photos into the new folder (each step requiring administrator's permission, as JamieJuno said). That did not work. But then, I renamed the NatGeo folder back to its original name and for some reason, I was able to slide the photos from "1-Family photos" into "1-National Geographic" which I had not previously been allowed to do, and voila! Finally have my slide show back!

Hope that helps someone.

Add your custom folder containing the images you'd like to use for your screen saver to the screen saver folder in - 'Mac HD' - 'Library' - 'Screen Savers' - 'Default Collections' --- I also have the shuffle option disabled. So far so good. Hope this helps.

Thanks for this. I find that I cannot move my entire photo library into the default folder. Any suggestions?

Since updating to OS X 10.10.4, my screensaver has not reverted back to NatGeo. Did Apple finally fix this?

I have a separate folder called "SCREENSAVER." I dragged that folder to the Default Collections folder and puff of smoke went up. I found the screensaver folder. How do I move the images in the screensaver folder to the Default Collections folder?