Boot Camp not enough space when there is

I noticed this thread when searching through a similar issue. I used Boot Camp last summer when I first got my current machine (have been using Macs since the early 90's) and successfully installed Windows 10 via Bootcamp with no issues whatsoever but it got to the point where I was running low on space on the Mac side and hardly ever using Windows so just removed Windows and the windows partition itself and carried on using my mac as normal. The space showed as available on the mac side and all added back up so all was well.

I've been having issues trying to put windows back on with boot camp saying that I don't have enough space even though I have more than enough. I am pretty sure that this is down to having an SSD and the way disk fragmentation works compared to your typical old fashioned spinning hard disk. I have 62GB free but Boot Camp says I can only create 40GB for windows (I can't make it any smaller than that) but it will only leave 4GB for the Mac side so if you do the numbers, that clearly does not add up. I should still have 18GB somewhere ...

You mentioned needing contiguous space to create a partition and I think that this must be the case. I don't use Time machine so don't have any snapshots taking up space and I also have about 1GB of purgeable space if that. All my Get Info's / Disk Utility / About This Mac etc etc all show the exact same space available so I am wanting to know if there's any way to make full use of the space I have left? I understand that the space is in fact there for normal files and that it must be the partitioning side of things but I have found APFS very flexible in that regard so far so I am disappointed with the issue I am having at present.

My next move is just a full format / zero all data / reinstall High Sierra from scratch from my pen drive, reinstall my Mac side and get it exactly how I want it, then go and do the Boot Camp thing and all will be well. It's just I'd rather not have to do that as my machine is running like a dream and I'm not (in theory!) running out of space.

Any suggestions welcome.

Regards

Dougie

Hi

Thanks for the reply.

I forgot to mention I don't run time machine at all and have never had it switched on. I did run a command to erase any time machine snapshots but none were found.

Would boot camp let me install windows 10 if I already did the manual labour with regards to disk partitioning etc myself beforehand? Only trouble is Disk Utility doesn't let you format as NTFS.

As I've had it installed before, when I hold Alt/Option on startup the option to boot into Windows is still there even though technically there's no Windows partition any more. I guess I'd have to make a bootable Windows usb pen drive and install from that but would need the Bootcamp Mac/Windows drivers too. Don't know if I could download those separately either.

Hello, I have this issue also. It says I need at least 40GB and I have 140GB available. I have run sudo tmutil listlocalsnapshots / but I just get the prompt again so I assume I have no snapshots.

I have run Disk Utility First Aid and everything is okay. Still can't get past the 40GB warning. What is the next step? Thanks. -Derryl

I am trying to install Win 10 on a Mac Pro OSX 13.6 with a 500GB SSD.

Hello. I'm having the same trouble. I tried the remove localsnapshot solution, and now the list is empty, but still says I need at least 40GB. Finder says I have 68GB and disk Utility says 51GB. I have iCloud and I unchecked optimize Mac storage in iCloud Drive. It's checked in Photos as I have about 98 GB used in iCloud and don't have that space in my SSD. I'm using a 2011 iMac with High Sierra 10.13.6.

I have tried almost everything to solve this problem and I realized that the bootcamp assistant gives me a wrong error. It shows me that there is not enough space on my disk, but I have 200GB. I choose a 128GB pendrive and then start transferring windows files. After 5-10 minutes it shows the "not enough space" dialog and when I open the pendrive I find that it always stop at the same large file. I know that with FAT32 you cannot move large files but the bootcamp always format the usb storage to FAT32. This is the error in this scenario. I format the pendrive to exFAT copy the windows files and install it manually not selecting all the options. Hope this helps

That has worked. I stand corrected. Thank you!

Excellent. Please remember to backup Windows and create a Windows System Restore point.

Thank you. Only doing it to play a couple of games, so nothing important to backup, really. 😝

How do I delete local snapshots. Thank you

Run

sudo tmutil deletelocalsnapshots 2018-06-02-182923

and repeat for each subsequent entry in the list. Once all of them have been deleted, test creating a BC partition via BCA.

Thank you.

i will try this .

Had worked out for me! thanks a lot

Excellent.

chk this

com.apple.TimeMachine.---------8889904199

I do not understand can you help with large amounts of detail?