Hi Alan, Click Restart , hold down Option-Command-R to boot into macOS Recovery, and reinstall the operating system. This way you will update to the lasted version of High Sierra that is compatible with your Mac.
(Did you know that different versions of Command-R cause different versions of macOS to be installed by macOS Recovery? Check out this Apple support article for the details.) Cheers, Ronni Ronni Brown’s iPad Pro 12.9-inch 256GB > On 27 Apr 2018, at 9:11 am, Alan Smith <[email protected]> wrote: > > I want to eke a few more years usage from my obsolete 21.5 inch late 2009 > iMac fitted with obsolete OSX 10.9.5 Mavericks by installing macOS 10.13.4 > High Sierra. > > However the High Sierra download phase has so far consumed 46 GB for the 4.8 > GB OS file. This is from three download attempts from the App Store. I click > the “Cancel” download button to escape the endless loop. I only checked > iiNet data usage after I cancelled the second attempt! > > Any suggestions for explaining the cause of the download loop - and for > installing High Sierra? > > I have ascertained that when the OS file download progress indicator reaches > around 97% it appears to freeze. Activity Monitor of process > “osinstallerplaind” actually shows a steady download to about 4.8 GB on the > Network tab, pauses for say 10 seconds, then resumes counting ever higher. > > The in-progress download file in > /Library/macOSInstallData/InstallESDmg.pkg.partial show the file appears to > be endlessly rebuilt. File size reaches roughly around 4.8 GB then starts > again - the next Finder refresh showed say 250MB. > > Something in the overall process is not taking the final step of stopping the > download and going to the installation phase. > > iMac has 12MB RAM and a 1TB drive with 850 GB free space. This old Mac is > WiFi only due to a faulty ethernet port. iMac is using the 2.4GHz band via a > Netgear R6400v2 router. Time to download large files is about the same as > for other Macs connected via ethernet. I’m on an NBN FTTP 50 Mbps download > speed plan. > > Cheers > Alan > > late 2009 21.5 inch iMac, OSX 10.9.5 > late 2012 27 inch iMac FD, macOS 10.13.4 > 2017 Mac mini SSD, macOS 10.13.4 > > > > -- The WA Macintosh User Group Mailing List -- > Archives - <http://www.wamug.org.au/mailinglist/archives.shtml> > Guidelines - <http://www.wamug.org.au/mailinglist/guidelines.shtml> > Settings & Unsubscribe - > <http://lists.wamug.org.au/listinfo/wamug.org.au-wamug>
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