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Question: Win10 Setup - "System Volume has no space"


I can't seem to continue on with my Windows 10 installation. When I click on 'new' nothing happens. There were a few attempts before where random errors with different hex codes would pop up while doing it.

I found a solution involving formatting the EFI partition during setup but I'm reluctant to do that. I tried mounting the EFI partition back in MacOS and removing about 150mb of cache files but then I noticed that even finder reports no available space on it.

Extra info:

  1. I'm using a USB 3.0 thumbdrive with the setup files + bootcamp drivers at root. I couldn't use BC Assistant because it always messed up my autoAttend.xml file when it rebooted to setup.
  2. I managed to copy OSXReserved to that thumbdrive before my mac restarted when I used BC before this.
  3. Modified the autoattend.xml at root: "<DiskConfiguration><WillShowUI>Always"
  4. gdisk reports MBR protective with GPT present.
  5. The unallocated space was previously MacOS Journaled partition. Formatting it to fat-32 makes the disk MBR hybrid and win10 setup wasn't too happy about that.

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Apologies if this isn't the right community to ask.

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Feb 28, 2018 9:47 AM in response to Hazmatyre In response to Hazmatyre

You should not be using 'New' for installing Windows on a Mac. The EFI partition should remain intact for macOS to work properly.

If you Mac only supports legacy BIOS/MBR installation, forcing GPT/EFI will cause issues with the Apple hardware/drivers from functioning properly.

If your Mac creates OSXRESERVED, it is more than likely a 2015 or later model. Can you confirm the year/model of your Mac (do not post the serial number)? 2015 and later models to not use a USB installer.

None of Windows installers have a USB3 drivers, unless you manually update install.wim to include USB3 drivers. You need to use a USB2 flash drive of 8+GB, only if BC Assistant prompts you for it.

Feb 28, 2018 9:47 AM

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Feb 28, 2018 10:00 AM in response to Loner T In response to Loner T

I use a 2016 Macbook Pro 13"

I did try using BC Assistant, but it gave me an <ImageInstall> error. I spent the day yesterday sporadically resetting my NVRAM and SMC and redoing the BC Assistant with countless redownloads of ISOs. I even tried unplugging my HDMI adaptor which comes with two USB slots - nothing has worked so far.

Is there anything else I can try to get it working through BC Assistant? Maybe upgrade from Sierra to High Sierra?

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Feb 28, 2018 10:00 AM

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Feb 28, 2018 10:29 AM in response to Hazmatyre In response to Hazmatyre

I do not recommend High Sierra. It will bring more issues.

The error message indicates that BCA is unable to derive the correct AutoUnattend.xml. I recommend

  • Remove the current Free Space and merge it back into macOS
  • Disconnect all external peripherals
  • Run SMC/NVRAM Reset
  • Verify that your ISO is the not block corrupted by verifying the MD5sum of ethics's ISO
  • Run BCA, and use the standard method of installation
  • Report any errors

Feb 28, 2018 10:29 AM

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Question: Win10 Setup - "System Volume has no space"