Every step below is from an official source
Switch from Apple Passwords (iCloud Keychain) to Proton Pass
What to do at Apple Passwords (iCloud Keychain) before you leave, what Proton Pass needs when you join, and everything else the switch touches. Your full plan is built in your browser and stays there.
Official sources reviewed . How we review sources
At Apple Passwords (iCloud Keychain), before you leave
Export all passwords to a CSV file on MacBefore
In the Passwords app on your Mac, choose File > Export All Passwords to File, click Export Passwords, then choose where to save it.
Export passwords from your Mac to a fileApple. ReviewedKnow which passwords can't be exportedBefore
You can't export Wi-Fi passwords, passwords shared with a group you didn't create, or access to Sign in with Apple accounts.
Export passwords from your Mac to a fileApple. ReviewedTreat the exported file as unprotectedDuring
Exported passwords are not encrypted. Anyone who can open the file can see them.
Export passwords from your Mac to a fileApple. ReviewedDelete the file after importing elsewhereAfter
Once the passwords are in your new password manager, delete the file you exported.
Export passwords from your Mac to a fileApple. Reviewed
At Proton Pass, when you join
Import a LastPass CSV in the browser extensionDuring
Export your LastPass vault as a .csv file. In the Proton Pass browser extension, go to Settings, then the Import tab, choose LastPass as the provider, add the file and click Import.
How to import from LastPass to Proton PassProton. ReviewedImport your Chrome passwordsDuring
Export your Chrome passwords as a .csv file. In the Proton Pass extension, go to Settings, then Import, choose Chrome as the provider and upload the file.
How to import to Proton Pass from ChromeProton. ReviewedFind the guide for your old managerBefore
Proton Pass's import tool works with most major password managers. Proton has separate guides for 1Password, Bitwarden, Dashlane, LastPass, Chrome, Safari and others.
Import passwords to Proton PassProton. Reviewed
Then: everything else the switch affects
The steps above are what Apple Passwords (iCloud Keychain) and Proton Pass say. Your full checklist adds the accounts, codes, payments and devices that depend on your password manager, in a safe order. It's built from your answers, in your browser.