My confidence in that being the case is low. Vous devez mettre à jour votre Mac via lApp Store sil fonctionne toujours sous macOS High Sierra. Lapplication Préférences système peut être utilisée pour mettre à jour votre Mac. Most common cause of this error is due to the invalid time in your mac. Yes, I could do the updates by running the mini-installer and letting the files be downloaded off Apple's website but while the Internet is pretty reliable and the network (external and internal) is relatively reliable, the whole setup is not immune to failure and I would not want my upgrade to fail in the middle because of some network issue or some traffic disruption or timeout.Īnd if I ever need to re-install High Sierra because of a failed hard drive, I must rely on Apple still having a copy of High Sierra that can be downloaded. La mise à jour de votre Mac vers le nouveau macOS Monterey vous permettra de bénéficier des dernières fonctionnalités et corrections de bugs. SOLVED This copy of the Install macOS High Sierra.app application is damaged. The complaint is that the mini-installer is not a valid installer application. And note that mini-installer file cannot be used with the createinstallmedia resource to create an installer on a USB flash drive.

Users can download the app via a direct link and then install it that way. This means that users that search for the installer will not find anything if they have a newer version of Mac OS. This is primarily because Apple has hidden the installer from the Mac App Store. It takes you to an Apple upgrade page that has a 'Get MacOS High Sierra' link on it that takes you to the App store but if you click on the Download button, all you get is the 24.5 MB mini-installer file. The best way to download Mac OS X High Sierra is via a direct link download. Yes, the link keg55 refers to does not help.

Macos high sierra install app