2010 IMac help

[Greatblue18]

I recently tried to partition my Mac with windows and when it didn’t work I tried to unpartition my hard drive and restore it to a single partition with just Mac OS on it and everything is screwed up now. It was booting into the Mac OS with just 150GB out of 500 total GB and after trying to reclaim the unclaimed space it doesn’t even boot into the Mac part anymore and it just boots into the MacOS Utilities. I can’t use the reinstall MacOS option because it says “This disk is locked” and it no longer displays MacintoshHD as a disk but displays “OS X Base System”. Will post pictures.
[doublepost=1513115300][/doublepost]https://ibb.co/fATpjb
https://ibb.co/nLFrxw
I couldn’t post a direct image because macrumors said they are too large to process

 

[Greatblue18]

Hopefully I can get some help on this I am still stumped.

 

[nambuccaheadsau]

Tell us how you set up the Windows partition.

If you used BootCamp, the only way to undo this was with BootCamp Assistant. if you used Disk Utility to remove the paretition you may well have crippled the drive and looking at an erase and clean install of the operating system.

 

[Greatblue18]

Yeah I used disk utility to remove the partition. It wont let me format any drive to reinstall anything.

 

[Greatblue18]

I made a windows install via usb and used bootcamp to partition it. I tried to unpartition using bootcamp but did not see an option

 

[Fishrrman]

1. Hope you have a backup!
2. Boot from an external hard drive or a USB flashdrive with a copy of the OS installer on it.
3. ERASE the internal hard drive -- NUKE IT back to HFS+ with journaling enabled (1 partition)
4. RE-install the OS
5. Restore your data from the backup.

 

[Greatblue18]

1. Hope you have a backup!
2. Boot from an external hard drive or a USB flashdrive with a copy of the OS installer on it.
3. ERASE the internal hard drive -- NUKE IT back to HFS+ with journaling enabled (1 partition)
4. RE-install the OS
5. Restore your data from the backup.

Can I make the Mac OS installer on a windows computer? Or do I need to make it on another Mac

 

[Fishrrman]

"Can I make the Mac OS installer on a windows computer? Or do I need to make it on another Mac"

Has to be created on a Mac, as far as I know.
No other way around it.

Alternative:
Go to ebay, there are sellers there who will sell you a USB flashdrive with a copy of OS already installed on it, "ready-to-go". They can offer various versions of the OS, whatever you need.
Might be "the way to go" if no other options are open to you.

 

[Greatblue18]

I was able to format the "OS X Base System" as Mac Osx Journaled and reinstall High Sierra via the built-in install. I also renamed "OS X Base System" to "MacintoshHD" I have no idea if that does anything other than being visually correct. Now from here how would I be able to reclaim my space. As you can see in the first linked image below I have 499.9GB available and in the second image which I have Mac OS installed I have 149.25GB useable (Which is the amount of space I was originally going to give MacOS to run on when I was trying to partition windows) Any help would be very appreciated.
https://ibb.co/ctjo0R
https://ibb.co/ky4AEm

 

[nambuccaheadsau]

For mine after using DU to kill the partition, it is stuffed and you are looking at an erase of the hard drive and a clean install as the fisho pointed out. To remove the partition you had to use BootCamp Assistant. With a partition in place, Boot Camp offers to remove when opened.

Further if any Mac you are using came with an optical drive originally, you have to use that to install Windows via BootCamp. That is a real annoyance to users that have removed the optical drive to place a second hard drive in the slot, or have a non-working optical drive.

 

[Fishrrman]

I'll pretty much repeat what I posted above.

You need the following:
- A copy of the OS installer
- A USB flashdrive 16gb
- The free app "Boot Buddy".

Use BB to create a bootable USB flashdrive installer

Now, BOOT FROM the flashdrive installer.
ERASE the internal drive to HFS+ with journaling enabled.
ERASE THE ENTIRE DRIVE.

Next, reinstall OS X.

THAT what you need to do to "get the space back...."