Q&A for How to Add a Picture to a Folder on Mac

Extra large icons: 256 x 256 pixels; large icons: 96 x 96 pixels (automatically rendered by Windows from 256 version); medium icons: 48 x 48 pixels.

It could be either, depending on what your preferences are set to. Either way, it'll work the same.

Sometimes the preview does not appear, especially since it is no longer on your desktop. If you double click the file, it should appear.

If your photo only displays a JPG icon on your Mac, it might be corrupted or not recognized correctly. First, check the file type by right-clicking the file and selecting 'Get Info.' Try opening the photo in Preview or another image viewer. If it still won't load, test it on a different device or try converting it to a PNG using Preview or an online tool. If the photo is within the Photos app, you can attempt to repair the library by reopening the app while holding Option + Command. As a last resort, ensure your macOS is updated, or try restoring the photo from a backup like iCloud or Time Machine.

The file you are using may not be recognized as an actual image. This often occurs if the picture was saved incorrectly or has an improper file extension, such as displaying "PNG" instead of the image itself. To resolve this, try opening the image in an editor, re-saving it as a proper .png or .jpg file, and then attempting to add it again. This process typically resolves the issue.

To create an album in Photos on your Mac, first open the Photos app. In the menu bar, click File > New Album (or press Option + Command + N) and give your album a name. You can then drag photos into the new album from your library, or right-click a photo, choose 'Add To', and select the album. To create a folder of albums, choose File > New Folder in the Photos sidebar, which allows you to organize multiple albums.