To manually import your contacts from Yahoo to iCloud, you can first export your Yahoo contacts as a CSV or vCard file. Start by logging into your Yahoo account, go to the Contacts section, and choose to export your contacts. Once you have the file, sign in to your iCloud account, go to the Contacts section, and import the CSV or vCard file to add the contacts to iCloud.

For a quicker and more reliable method to import Yahoo contacts to iCloud, you can use a third-party tool like MailConverterTools Yahoo Mail Backup Tool. This software allows you to directly transfer contacts from Yahoo to iCloud without the need for exporting and importing manually. The Yahoo Mail Backup Tool simplifies the migration for you, ensuring a seamless and accurate transfer of contacts from Yahoo to iCloud. Also, a demo version of the tool is available for any user to access its features before purchasing the premium version.

Read more: https://www.mailconvertertools.com/blog/import-yahoo-contacts-to-icloud/