I tried to download the Yosemite install app and make a bootable usb with Diskmaker X but it failed and told me the install file became corrupted. This caused an endless Finder crash loop that I could only fix by deleting the Install file from the bash prompt in single user mode.
Now the app store shows "an error has occurred" and I can't download the app at all:
I tried deleting the app store cache to no avail, now I'm stuck. Can anyone help me figure this out? Thanks