The remainder of what was still is if you or another knows how to recover the data. It is wholeheartedly recommended you wipe the hard disk because to simply reinstall Mac OS on a newly formatted disk does NOT make the installation any more “clean’ it only makes it so to both the user and operating system. The passes are unable to be customised or verified but it should suffice. Mine is 1.82 TiB so the entire task took days to complete. I could have used BCWipe but I chose to travel the easy route and use Disk Utility to perform a seven-pass wipe on the entire primary hard disk. Now that your fully operational bootable clone is just that – fully operational, it is time to have some fun and give yourself some piece of mind. Step 02: boot from the clone and permanently destroy your primary operating system When the cloned operating system is ready for live production, test it because it will be what you will use for the next two days if you follow my process exactly as I explain it aside from the particularities of my Carbon Copy Cloner task schedule. I mentioned the Recovery HD partition above and the relevant setting for that is located on the General pane in the preferences window. That is how I do things and I know others – especially average every day users will never delve nearly as deep into the software. SafetyNet is off thus a deletion pass will be performed if required space is insufficient.root-level items will not be protected.corrupted files will be found and replaced.volumes will be verified using strict volume identification.a full clone will be ensured with incremental updates every four hours.The particular schedule I set up states the following: I personally use Mike Bombich's Carbon Copy Cloner to successfully accomplish this. By a clone I mean a fully working bootable clone complete with the Recovery HD partition. If you do not wish to read this is not for you.īefore you do anything, it is wholeheartedly recommended you clone – not back up, synchronise, copy et cetera the current iteration as it is of the primary operating system in use. Folks may disagree with some of it but thus far nobody has outlined their process. Below is an outline of the process I used with nothing but successful success. Reinstalling does some serious good for a machine in such a scenario. Sure, the user account was completely obliterated via Users and Groups, but the select lot of us know Mac OS's digital trails from yesteryear were clearly visible if one knew how and where to search. This late 2009 model iMac was provided to me last year thus it had five years of build-up including mine when I began to use it till I did what I will outline below.

As the story begins, I did this on Sunday 05 April 2015.

Format mac hard drive and reinstall os