Preview is not exporting to any format

As also suggested by Heretostay59, the first step I would try is resetting the preview preferences.

First attempt, in my case for example ( Sonoma 14.1.2 ), the file is located in:

~/Library/Containers/Preview/Data/Library/Preferences/com.apple.Preview.plist

but also in my case the "go to folder" method doesn't work, so I would do:

1) Go to your Home folder ( the one with documents, music, pictures ecc..)

2) Press CMD + Shift + . -> this will show hidden folders and files

3) Enter the hidden Library folder

4) Open Containers, than locate Preview, then Data, then Library, then Preferences and then locate the com.apple.Preview.plist file

5) Copy that file on the Desktop ( as backup ) and delete it from the folder.

6) Restart the Mac and try to do the operation you were doing again

Let us know if it solved the problem!

Edit: Also, could you tell me what kind of extension the file has?

It seems like you're encountering an issue with Preview after the Sonoma update on macOS 14.2. Here are some troubleshooting steps you can try to resolve the problem:

1. Reset Preview Preferences:

- Sometimes, resetting the preferences of Preview can resolve unexpected behavior. To do this, quit Preview, then navigate to ~/Library/Preferences/ and locate the file named "com.apple.Preview.plist". Move this file to the desktop (this acts as a backup), then restart your Mac and try using Preview again.

2. Update macOS:

- If you're not already on the latest version of macOS, consider updating to macOS 14.3 if it's available. Apple frequently releases updates to address software issues and improve stability.

3. Repair Disk Permissions:

- Use Disk Utility to repair disk permissions on your Mac. Incorrect permissions can sometimes cause issues with applications like Preview. Boot into Recovery Mode, open Disk Utility, select your startup disk, and choose "First Aid" to repair disk permissions.

4. Check File Compatibility:

- Ensure that the images you're trying to export are in a compatible format and meet the requirements of Preview. If possible, try exporting different types of images to see if the issue persists across all formats.

5. Use Alternative Software:

- As a temporary workaround, consider using alternative software for exporting images until the issue with Preview is resolved. There are several third-party image editing applications available that may offer the functionality you need.

6. Contact Apple Support:

- If none of the above steps resolve the issue, it's recommended to contact Apple Support for further assistance. They can provide personalized support and may be able to offer additional troubleshooting steps or escalate the issue if necessary.

I hope one of these solutions helps resolve the problem with Preview on your iMac.

Regards

It will help us get a good idea of what is causing your problem if you provide a report of your system, that way we do not have to play 20 questions with you. The report we are requesting does NOT provide any personal information and is extremely safe to use. Please navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it. This report will help us get a good idea what has been installed on your system and help us be able to diagnose what may be wrong.

When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again. 

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Then please post your EtreCheck.