Hi there! I see your FitMe app is stuck loading at 68% on your Mac with OS X 10.15.7. Let's work through this together.

First, just to clarify, is this happening when you launch the FitMe app or when you are trying to load specific content inside it? Also, have you tried restarting the app or your Mac already?

Meanwhile, here's a straightforward set of steps to try:

1. Force Quit the App and Relaunch
- Click the Apple menu at top-left, choose "Force Quit…"
- Select FitMe from the list and click "Force Quit"
- Relaunch the app and see if it progresses past 68%

2. Check Internet Connection
Sometimes loading issues happen due to network hiccups. Make sure your Wi-Fi or Ethernet is connected and stable, and try again.

3. Clear App Cache / Data (if possible on Mac)
Unlike mobile, clearing app cache is less straightforward on Mac. But you can try:
- Quit FitMe
- Go to Finder, press Shift+Cmd+G, enter ~/Library/Application Support/ and locate a FitMe folder. You can try moving this folder to the Trash (or a backup location) to let the app rebuild its settings and cache on next startup.

4. Restart Your Mac
A simple system restart can clear temporary glitches affecting apps.

5. Update FitMe App and macOS
Ensure you have the latest version of FitMe from the App Store. Also, verify if there are any software updates for macOS 10.15.7.

If after these you still see 68% stuck, it could be a backend or server issue on FitMe’s side, or a corrupted installation.

Let me know what you've tried so far and how it goes after these steps, and we'll take it further from there!