Xcode xip "The archive does not come from Apple"

Hi all,


I'm trying to install an older version of Xcode, but when I try to open the .xip file I get the following error: 'The archive "Xcode_9.1.xip" does not come from Apple'. What's causing this error and is there a way to fix it?


Thanks in advance.

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bvandormaelst
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The certificate used to sign the files probably expired. As a workaround, I managed to uncompress the xip file by setting my system date to back to september.

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ajburlet
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Apple has updated the archives for all these old versions with new signing. You can download them at the apple developer downloads site. I would recommend going that route to make sure you are getting valid, un-compromised versions.
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haikuty
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