Hi mihály273,
The following steps address what you're describing specifically, and should provide a solution:
- "In iTunes on your Mac, go to File > Home Sharing > Choose Photos to Share with Apple TV.
- The Photo Sharing Preferences window opens.
- Select “Share Photos from”, then select Photos or iPhoto, or choose a folder to share.
- Choose whether you want to share photos and albums or just selected albums, then click Apply.
- The photo albums or folders you share appear in the Computers app on Apple TV."
You can find these steps along with other information that may be helpful, here: View photos from your Mac on Apple TV – Apple Support
If you have followed the steps correctly and you still have the issue, let us know if you get any specific alerts or error messages when trying, as those may help us determine what might be causing the issue.
We also recommend restarting your devices and keeping them updated as those steps assure you have cleared out any minor software issues and are running the most current version.
Update your Apple TV - Apple Support
Update macOS on Mac - Apple Support
If you still have questions, reach out to Apple Support directly, as this may require closer guidance: Get Support
Cheers!