forgotten password on old macbook stops me from transferring that data to my new macbook pro m2

Hello moor5,

Thanks for reaching out to Apple Support Communities. We see you have some questions about a forgotten password on your Mac, and transferring data, and we'd like to help. While there isn't a workaround for this, the following link can help with what to do If you forgot your Mac login password.

While there are a few different options, resetting your password seems like the best step from here.

1. If you see the option to restart and show password reset options, click it to restart your Mac. Then take one of these steps:

* Sign in with your Apple ID, if asked. You might also be asked to enter the verification code sent to your other devices.

* Enter your FileVault recovery key, if asked. It's the long string of letters and numbers you received when you turned on FileVault and chose to create a recovery key instead of allowing your iCloud account (Apple ID) to unlock your disk.

2. Select a user that you want to reset the password for, then click Next.

3. Enter your new password information, then click Next. 

4. When the password reset is completed, click Restart.

Let us know if this helps.

Regards.