Cannot backup Pixel 9 successfully on MacOS

[justinwubo]

Device info

Manufacturer: Google Pixel 9 Pro XL
Android version: 16 beta
Custom ROM/rooted? not rooted
Model:

System info

Available disk space: more than 1TB
Operating system: MacOS latest version, Sequoia 15.5

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Describe the issue below.

Whiptail is not installed, but dialog is. Defining whiptail as a function that calls dialog.
Please enable developer options and USB debugging on your device, connect it to your computer and set it to file transfer mode. Then, press Enter to continue.
Samsung users may need to temporarily disable 'Auto Blocker' first.
/Users/justinwu/Downloads/open-android-backup-master/functions/helper.sh: line 6: [: -v: unary operator expected

• daemon not running; starting now at tcp:5037
• daemon started successfully
  If you have connected your device correctly, you should now see a message asking for access to your phone. Allow it, then press Enter to go to the last step.
  Tip: If this is not the first time you're using this script, you might not need to allow anything.
  /Users/justinwu/Downloads/open-android-backup-master/functions/helper.sh: line 6: [: -v: unary operator expected
  List of devices attached
  46111FDAS004KB device

Can you see your device in the list above, and does it say 'device' next to it? If not, quit this script (ctrl+c) and try again.
If you can see your device, press Enter to continue.
/Users/justinwu/Downloads/open-android-backup-master/functions/helper.sh: line 6: [: -v: unary operator expected

./backup.sh: line 122: [: -v: unary operator expected
Couldn't find srm, a command provided by the 'secure-delete' package on Debian and Ubuntu. Secure removal of sensitive temporary files created by the script is unavailable - encrypting your disks is recommended.
./backup.sh: line 170: [: -v: unary operator expected
/Users/justinwu/Downloads/open-android-backup-master/functions/helper.sh: line 67: [: -v: unary operator expected
Cleaning up after backup/restore...
Using the 'Fast' data erase mode.
Cleanup complete.
If this project helped you, please star the GitHub repository. It lets me know that there are people using this script and I should continue working on it.

[mrrfv]

Hello, I sincerely apologize for missing this issue.

This error appears when using an outdated version of bash - what Apple ships on macOS by default. The instructions in the README address this by upgrading bash as part of dependency installation (brew install bash). Could you please double-check you've done that?