When you download the newest version of Skype for Mac, whether you're a new or existing user, you'll be asked to verify your mobile number in order to automatically add friends to Skype. Skype will use this information to verify your contact details and automatically add friends in your address book who are also on Skype.
To make yourself searchable in the newest version of Skype for Mac:
- Sign in to Skype.
- Go to Skype > Preferences....
- Select Contacts.
- You can enable or disable Automatically add friends, select the address books to add and update your Verified Contact Details: