This works even while the wallet is loaded.
How to Find a Lost wallet.dat File on Your Computer - Datarecovery.com
Open Finder, press Cmd + Shift + G , and paste: /Library/Application Support/Bitcoin/ Linux Location ~/.bitcoin/ How to Properly Backup wallet.dat wallet dat
If you do not want to download the massive several-hundred-gigabyte Bitcoin blockchain, you can extract the raw private keys directly.
The wallet.dat file is a powerful but fragile asset. It is the master key to your cryptocurrency. By understanding what it is, where it lives, how to secure it, and how to recover it when things go wrong, you take the most important step in becoming a truly autonomous crypto user: taking full responsibility for your own keys. This works even while the wallet is loaded
wallet.dat file is the critical data file used by Bitcoin Core
This is the easiest case. If you have a backup of your wallet.dat file, recovery is straightforward: It is the master key to your cryptocurrency
If you encrypted your wallet, the keys are locked within this file. Locating Your wallet.dat File