Now open the downloaded version of macOS Sierra that is on the desktop and click on it to begin the install (Connect you mac to power source before it).Now rename the new partition from any name you want then click Apply.To resize the partition just drag the partition corners.Currently, it will be a single drive, so click the Plus button beneath it and then click on the new partition you created.
Now you’ll see a large rectangle with the heading Partition Layout.Open up Disk Utility (Applications > Utilities > Disk Utility) and select the primary drive.#How to fix application can’t be used from this diskġ.Download The macOS Sierra 10.12 from above link if you didn’t do it yet.Ģ.Now click on Sierra 10.12.dmg to mount the image on your Mac.ģ.Once mounted open the mounted drive named with “ Install 10.2 Developer Preview.”Ĥ.Now the tricky part comes here if you open the “Install 10.2 Developer Preview” drive and click on an icon to install it.ĥ.You will get this error “The Install 10.12 Developer Preview application can’t be used from this disk.”Ħ.So to solve this problem just slide the “Install 10.12 Developer Preview” file to the desktop.ħ.Once copied Now run the setup again from the desktop file that you copied.Ĩ.Boom !! the error gone! #Now follow below steps before installing it.
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