My MacOs is up to date (10.14.4) However, I cannot download Xcode on Appstore. The Error is " There is not enough free disk space to install the product. " I have a 75 gb free disk space. I call the support they said Xcode need to 128 gb enough space. There is my question. My Macbook Air 2017 disk space is 128 gb. What should I do?