How to restore macbook from icloud?
iOS has the option of backing up to iCloud.

OS X can use iCloud Drive to maintain remote synchronised copies of some data. For everything else, you need to have been using Time Machine locally, or a paid online backup solution such as Backblaze for disaster recovery.

It is your responsibility to ensure these are active &amp; up to date.

With no backup, then you need to be looking at data recovery solutions. Whether that is software such as Disk Drill or Data Rescue or a dedicated [&amp; expensive] Data Recovery Service depends on the actual cause of the HD 'crash' &amp; the value of the lost data.