Boot Camp could not partition my disk, MacOS Big Sur

App & System Services Core OS
dima_dM OP
Created Dec ’20
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Hello, I have a problem.
When I try to install Windows 10 using Boot Camp Assistant, I get the "Unable to partition disk" error.
I have no copies of Time Machine and the like.
APFS container resize error code: 49187
An issue was encountered while resizing the APFS container structures. : (-69606)

I have MacOS Big Sur (11.1) on my MacBook Air 2017

Replies  1
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kumowoon1025 OP
Dec ’20
launchd tells 49187: (os/unix) operation on device would block Maybe an update has mounted/booted from an APFS snapshot? If you have a 128GB internal disk it can be especially difficult to make enough free space to satisfy Boot Camp Assistant unless you do an erase and install.
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Boot Camp could not partition my disk, MacOS Big Sur
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