Xcode on Mac App Store can't install , show disk space not enough

Question

I\'m using the Mac OS to install the XCode10.1.

I have 18.43GB free disk space in the mac,

but when I click the install button on the Xcode from the app store,<

Answer 1

the problem with time machine! please remove old snapshoots

sudo tmutil listlocalsnapshots /
com.apple.TimeMachine.2019-09-25-135035
com.apple.TimeMachine.2019-09-28-232824
com.apple.TimeMachine.2019-09-29-012547
com.apple.TimeMachine.2019-09-29-022054
com.apple.TimeMachine.2019-09-29-031621
com.apple.TimeMachine.2019-09-29-052318
com.apple.TimeMachine.2019-09-29-070831
com.apple.TimeMachine.2019-09-29-092229
com.apple.TimeMachine.2019-09-29-101756
com.apple.TimeMachine.2019-09-29-114952

tmutil deletelocalsnapshots 2019-09-25-135035
tmutil deletelocalsnapshots 2019-09-28-232824

etc