On deleting data from a macbook air early 2015 i have managed to delete the entire HD. How do i restore the operating system?
Earlier Mac models
You'll need to reformat the hdd before you can reinstall macOS.
Please see: Use Disk Utility to erase an Intel-based Mac - Apple Support
Then follow the guidance here for Intel Mac: How to reinstall macOS - Apple Support
An other option is to create a bootable USB Stick and after formatting your HDD just reinstall macOS with the stick. A step by step you can find her: Create a bootable installer for macOS - Apple Support
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On deleting data from a macbook air early 2015 i have managed to delete the entire HD. How do i restore the operating system?
