Can i download install app for highsierra

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January 23, at am. LexS says:. If you're using a Mac notebook computer, plug it into AC power. Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed. If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.

Please allow installation to complete without putting your Mac to sleep or closing its lid. I began to figure out what was going on and found out the following. The tiny 19 MB incomplete installer requires an internet connection during usage to download the rest of the High Sierra update files. This app is intended for those with unsupported Macs and Hackintosh users, but any Mac user can use the app to be able to download the complete macOS Mojave installer file from Apple server.

For our purposes in this particular walkthrough, we will use the app only to download the complete installer file. This method relies on a third party app from an unverified third party source. If you are not comfortable with using unvetted and unverified software, do not follow this process. Now, step by step guide. By default, macOS preventing apps from unidentified developers or sources from being launched.