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<div style="background-color: white; border-width: 0px; clear: both; font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; line-height: 18px; margin-bottom: 1em; padding: 0px; vertical-align: baseline; word-wrap: break-word;">You can change the Apple Developer ID that Xcode has associated using Mac OS X’s Keychain Access app:</div><ol style="background-color: white; border-width: 0px; font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; line-height: 18px; list-style-image: initial; list-style-position: initial; margin: 0px 0px 1em 30px; padding: 0px; vertical-align: baseline;"><li style="background-color: transparent; border-width: 0px; margin: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">Quit Xcode</li><li style="background-color: transparent; border-width: 0px; margin: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">Open Applications > Utilities > Keychain Access</li><li style="background-color: transparent; border-width: 0px; margin: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">Locate the Keychain entry named “daw2.apple.com ([your Apple ID])” of kind Internet password</li><li style="background-color: transparent; border-width: 0px; margin: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">Delete this Keychain entry and retry the download in Xcode by re-entering your credentials, or double click on the entry and update the Account and Password fields</li><li style="background-color: transparent; border-width: 0px; margin: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word;">Open Xcode and retry the content download</li></ol><div>Source</div>