![]() ![]() If you have difficulty/receive an error, you can also do this in Disk Utility.Hdiutil unmount "/Volumes/OS X Base System/"ĭiskutil unmountDisk $(diskutil list | grep "OS X Base System" -B 4 | head -1)ĭiskutil unmountDisk $(diskutil list | grep "OS X Install ESD" -B 4 | head -1) Hdiutil unmount "/Volumes/OS X Install ESD/" Copy the base system into the sparse image:Ĭp "/Volumes/OS X Install ESD/BaseSystem."* "/Volumes/OS X Base System/".Hdiutil mount "/Applications/Install OS X Yosemite.app/Contents/SharedSupport/InstallESD.dmg" Hdiutil convert yosemite.dmg -format UDSP -o yosemite.sparseimage Convert into UDSP (sparse image) format:.Iesd -i "/Applications/Install OS X Yosemite.app" -o yosemite.dmg -t BaseSystem Install iesd, to customize OS X InstallESD:. ![]() The following instructions are heavily borrowed from frdmn’s notes blog with additional notes added as needed. ![]() It took me about half an hour to download, but depending on your connection speed your mileage may vary. To get started, download Yosemite from the App Store.įair warning: the download is ~5.5GB. I was in luck! It turns out this is actually really easy to do. Recently when working with a client we encountered a situation where it would be beneficial run a Mac VM on our Mac laptops, so I decided to investigate.
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