It recognized the new partition and displayed it as the option to choose the location.
I then created a partition out of the remainder of the free space, again using Windows (ntfs). Instead, it only showed the 6g partition and did nothing else.Ĥ.
I then tried to run the installer on Mac to install OS on the free space, assuming it would create its own partition for the OS, or offer me some options to do so as part of the installation. The OS installer then installed ("restored") there and automatically reformated to Mac formatting. Next, I created a 6g partition for the OS installer using a Windows machine (ntfs). I assume this means Apple, unlike Windows, cannot create partitions from free space when it is performed from a partition from the same physical drive, even though it is not affected by making more partitions, so.ģ. If I try to use Mac command line to create a partition out of free space, it always gives the error: couldn't unmount disk. When I tried to create a partition out of free space using Disk Utility, the options to do so are greyed out.Ģ. There are no other partitions because the rest is allocated as free space.Įven though I figured this out at the end, I would not have been able to do so without the clues given to me in this thread regarding the Mac command language and syntax-thank-you.ġ. It only shows the recovery partition to choose from but it is greyed out, of course, because it shouldn't be installed there. I already ran the installer and it is looking for a partition to install it on. I am trying to create a partition to install OS.
I can partition and format MS disks all day long, but I don't know how to do it with this. Using terminal is no risk here as there is nothing on it anyway. By "graphic options", I mean what I believe Slydude is referring to, but the Add option is greyed out. The icon in MacUtilities looks like High Sierra. According to the article, 0b does not create a zero byte partition, but instead creates a partition using all the remaining available free space, that is what I wanted, after creating a 6g partition for the installer. I tried again with zero, but received a couldn't unmount disk error. In the example line, there was no slash, so it looked like the letter. This stellar partition manager will help you in a great way to fix this unmount issue in your Mac.-0/O-okay.
Preview The FilesIf you are not familiar with this third-party software then there is another Third-party software that is nothing but a stellar partition manager.
If the above boot method is not working for you to fix this issue, then you can simply follow the recovery partition.