I have a MacBook Pro and an iMac. I successfully installed Sierra on my MacBook Pro and had it up and running just fine. I decided to do a clean install on my iMac two days ago and started it up from Recovery Mode, erased the hard drive, and attempted to install a new system. Right from the start the process didn't seem to be going anyhere and eventually gave me a dialogue saying the download failed. I tried doing it over again several times over the last two days with the same result each time.

Apple's MacOS High Sierra update offers lots of behind-the-scenes changes that should make the Apple's desktop OS easy to use. High Sierra might disappoint those. Note: For Mac High Sierra (10.13.x), you will need to click on Allow too. Click the lock icon again to prevent any further changes. Installing the Zoom application. Visit our Download Center. Under Zoom Client for Meetings, click Download. Double click the downloaded file. It is typically saved to your Downloads folder.


I did some research and discovered how to create a bootable installer for Sierra and thought this might work.


So I went to my fully functional MacBook Pro and followed the steps to format a flash drive and download the installer.


However, when I tried to download the installer from the Mac App Store I had the same problem as the download grinded away for awhile and eventually gave me an error message of failure.


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So at this moment I am stuck with a iMac with an empty drive waiting to install Mac OS Sierra which will not download in either recovery mode or from the Mac App Store.


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Help! Any ideas?

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