i have a 4tb hdd but i had made it into 2 partitions for windows 10 data and windows 7 data(i believe. that or i made it for windows 10 dual boot os) but the process went wrong and now that partition is dead. i un-allocated it and tried to merge the device and it says there is no space to create a partition. easeus has no options for that space. how can i delete that un-allocated space and merge it to gain my full hard drive space back. im willing to format the whole thing.(since im having issues with the drive not wanting to work with steam anymore). just dont know the way to do it. since all i know is how to wipe a partition using easeus. tried to add pic but this subreddit doesn't seem to allow pictures.
OK so you did it. You did all the right steps but now your mac boots straight to Windows, and when you hold down option key you only see the Windows boot drive, no macOS. It's gone. Well I sure did panic and thought that all my files were gone forever, that Easeus had formatted the wrong drive or something. I am a music producer and a design student and practically all my work was on my mac drive. What to do.
After hours of googling trying to understand what might have happened I figured it out, and solved it.
What have happened is Easeus doesn't recognize APFS volumes, and have somehow overwritten its partition type to one that is unrecognizable for the mac.
The data is still there, mac bootloader just can't see it and thus boot into it.
This here IS the easiest method, I believe. No need to put macOS on a bootable external drive or run recovery mode. None of that. The fix with this method is just a couple of key presses away.
and yes, THIS WILL PRESERVE YOUR DATA.
I'll write this
oversimplified so everyone can do it.
Step by step when booted into Windows: 1: Download
gdisk Windows version.
2: In Windows program search type "cmd" (terminal) and run it as an administrator
\Reminder to press 'Enter' to continue after entering inputs**
3: Move to the directory where gdisk is, if it's in downloads you should input this:
cd c:\users\***\downloads\gdisk
*** is your specific user name. It's important to put '\' not '/'.
4: Now we will start gdisk. Choose 32 or 64 version depending on your windows version. Google it if you don't know which one you have.
gdisk** \\.\PhysicalDrive0
** is 32 - or - 64
5: Press 'p' to show partition table. Note which number your mac partition has. You do this by noting the storage amount. It's is most likely the largest one if you have made a smaller Bootcamp partition.
For me it was 2, and I think it is in most cases because of a smaller recovery partition being 1 and mac main partition following as 2.
6: Press 't' when you have noted what number your mac partition has.
7: Enter the number of your mac partition.
8: Enter 'af0a'. This is the hex code for the GUID APFS format.
9: Press 'w'
10: Press 'y'
Boom. You have now recovered your macOS.
I hope this saved you time and effort!
