This issue might be related to recent updates or changes in the Airmail application or macOS itself. Here are some steps you can take to troubleshoot and hopefully resolve the issue:
1. **Update Airmail and macOS**:
- Ensure that you have the latest version of Airmail installed.
- Check for any macOS updates and install them.
2. **Restart Airmail and Your MacBook**:
- Sometimes, simply restarting the application and the computer can resolve such issues.
3. **Rebuild the Mailbox**:
- In Airmail, go to the account settings and look for an option to rebuild or reindex the mailbox. This can often resolve issues with attachments not displaying correctly.
4. **Check Airmail Settings**:
- Make sure that Airmail's settings for handling attachments haven't been changed. Look for any options related to attachments and ensure they are configured correctly.
5. **Check Disk Space**:
- Ensure that your MacBook has enough free disk space. Low disk space can sometimes cause issues with handling attachments.
6. **Test with Another Email Client**:
- Try opening the same emails with attachments in another email client like Apple Mail or Outlook. This can help determine if the issue is specific to Airmail.
7. **Clear Airmail Cache**:
- Clear the cache and temporary files for Airmail. This can often resolve issues with corrupted files.
- Navigate to `~/Library/Containers/it.bloop.airmail2` (or a similar path depending on your version) and delete the cache folders.
8. **Reinstall Airmail**:
- If none of the above steps work, consider uninstalling and reinstalling Airmail. Make sure to back up any important settings or data before doing this.
9. **Contact Airmail Support**:
- If the issue persists, it might be a bug or an issue that requires a fix from the developers. Contact Airmail support for further assistance.
Following these steps should help you troubleshoot and resolve the issue with attachments not opening in Airmail.