Illustrator install failed. Error Code P1

[duncanqian]

Mac Adobe Illustrator CC Installer

Sorry, installation failed

An unkown error has occurred. (Error Code P1)

What's the problem? How to fix it???

[Terri_Stevens]

the answer to this is usually to make sure the desktop app is up and running and use it to do the installation.

[kglad · Accepted solution]

per above, install the cc desktop app from here, https://creative.adobe.com/products/creative-cloud and use it to install your cc programs and trials.