

/cdn.vox-cdn.com/uploads/chorus_image/image/64828040/Screen_Shot_2019_06_24_at_10.55.53_AM.0.png)
Open Launchpad > Delete " Install macOS Sierra" file with a question mark on it.And you may follow below tips to fix this issue: And this has become a common issue that many users have to face while upgrading Mac to a new operating system.

If your Mac shows a error message that "An error has occurred" or "Failed to Download" while you are trying to downloading a new update for macOS Sierra. Fix macOS Sierra fail to download or "An error has occurred" issue Download for Mac macOS 13 - 10.9 Also Available for Windows Step 2.
