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 App Store app does not account for the purgeable space. I have filed a feedback on this issue some weeks ago to the Apple Feedback Program: it seems fixed since macOS Catalina, as now it works without workaround.

For previous MacOS see this answer