Hi there! I understand that not all pictures are showing up in your Flipped app on your Mac running OS X 10.15.7. Let’s work through this step by step to get those pictures displaying properly.

First, could you tell me a bit more about the issue? For example:
- Are certain pictures missing consistently, or does it happen randomly?
- Are the missing pictures in specific conversations or everywhere in the app?
- Have you recently updated the Flipped app or your Mac OS?
- Are you connected to a stable internet connection when you notice this issue?

While I wait for your details, here are some initial things we can try:

1. Restart the Flipped app: Sometimes a fresh start helps the app reload all content properly. Quit the app completely (use Command + Q) and then reopen it.

2. Check your internet connection: Pictures often need to download from servers. Verify your Wi-Fi or Ethernet is working well. Maybe try opening a website to confirm.

3. Clear app cache or temporary files: Flipped might store cached data that could get corrupted. Since you’re on Mac, you can try quitting Flipped, then navigating to ~/Library/Application Support/Flipped and deleting any cache folders if they exist. Don’t worry—it won’t delete your messages, just temporary files.

4. Update the app: Ensure that Flipped is running the latest version compatible with your OS. You can check for updates via the Mac App Store or the official Flipped website.

5. Log out and log back in: Sometimes refreshing your account session can solve content loading issues.

Could you please try these steps if you haven’t already, and let me know how it goes? If the problem persists, we'll dig deeper.