How to reformat Macbook Pro SSD to regain "Free Space" I just tried installing Windows 10 through Boot Camp. Before it actually started installing (but after I had partitioned my disk), I realized I had not plugged in a USB (which apparently you are supposed to do). So I exited the Windows pre-installation program so that I could start afresh with a USB.

I put in a USB and started up Boot Camp again. This time, however, it told me that I need to get rid of the partition. I tell it to do so, but it errors in this process! So now, I am left with 60GB of "free space" that I cannot reformat back into my main storage.


As you can see, there is no partition on the left side that I can remove. I simply have 60GB of "Free space" that I now cannot use. Please help!
You can simply create a new partition using Disk Utility to regain those 60 GB for usage. Another possibily is to change the size of your existing partition, depending on its current file system.