Hi,
I downloaded the xcode 9 from developer download page and failed to extract it with an error:
The archive "XCode_9_beta_4.xip" is damaged and can't be expanded.
I checked the file with pkg-util, it displayed "invalid checksum".
I'm on Mac OSX 10.12.5 and the harddrive has 180GB+ free space.
I have downloaded it completely for 3 times on Mac/Windows. I don't think the file is corrupted during network transmission.
Please help. Thanks.