

This gives you a bootable backup of the HDD that you can use while you do the clean install/rebuild. So it’s not easy to predict the time required to complete that taskĬarbon Copy Cloner can build a bootable identical copy of a 1TB HDD onto an external 1TB SSD (e.g. BUT…A clean install is very tedious, time consuming and requires good internet bandwidth to download various macOS updates, new versions of apps, etc. Click to expand.A clean install and rebuild is the ideal because it reduces the OS/app foot print by removing cruft and unused apps etc.
