Thanks for the explanation Jake. You are correct in that my "thinking" was based on the way diskutil displayed information before the implementation of APFS. However, I have to admit.. the average user is going to find all that hard to understand.
I am a bit concerned though in that member "rolanddes" has admitted to having a boot camp partition previously on the drive and then removed it. There are several anecdotal threads in other forums regarding the removal of a boot camp partition from a APFS formatted drive using the boot camp assistant and the problems that then occurred. It will be interesting to see if member "rolanddes" still has access to the entire drive.
Well, Charlie, in Post #1 he says it's a 250GB drive, and diskutil shows 250GB for the container, so I believe he has access to all of the drive. The quickest way to check is to do a Get Info on the Macintosh HD drive and see how much is Available. If it's the 150GB I calculated, then he is good to go.
Now, if the drive is physically larger than the 250GB he said it was, then it may be that there is space "missing" but as of now, with his statement, I think his full 250GB drive is available to the container..
Yes, I did remove the bootcamp partition. But I didn't do it via Bootcamp. I used Disk Utility under opt+r menu at the boot. So I have been able to reclaim the space into container. I wanted to check whether the results in the diskutil are accurate.
Now my only issue is seeing windows option if I hold opt key at booting. Is there any way to remove it as well?