Hi there! I understand that you're having trouble sending PDFs via email from TurboScan on your Mac running OS X 10.15. I'd like to help get that sorted for you.

First, can you tell me a bit more about the issue? For example:
- Are you able to create the PDF successfully in TurboScan?
- When you try to send the email, do you receive any error messages?
- What email app are you using to send the PDF (e.g., Apple Mail)?
- Have you noticed whether your emails get stuck anywhere (like in the Outbox)?
- Have you tried sending smaller PDFs or sending from another email account?

While I wait for your details, here are some basic steps we can try together:

1. Check Your Internet Connection
Make sure your Mac has a stable internet connection when sending the email.

2. Restart Your Mac and TurboScan
Sometimes simply restarting the app and device resolves temporary glitches.

3. Verify Email App Settings
TurboScan uses your default Mail app to send emails. Please check:
- That your email account is correctly set up in Apple Mail.
- Try sending a regular email with an attachment from Apple Mail outside of TurboScan to confirm it works.

4. Re-add Your Email Account
If emails are stuck in Outbox or sending fails:
- Open Apple Mail > Preferences > Accounts
- Remove the problematic email account, then add it again.

5. Update Apps and OS
Ensure TurboScan and your email app are updated to the latest version supported on OS X 10.15.

If these steps don’t fix it, I can guide you through more advanced troubleshooting or look up specific fixes.

Could you please let me know what you have already tried and any error details you see? That way I can tailor my help better.