how to repair yosemite from dmg file using os x utilities

Type this command into terminal (using tab autocomplete here makes life easier) - > (type /Vol and than hit tab, it will auto complete) ** When typing in terminal, use tab to autocomplete the directories.

Quit disk utility and open terminal from the top menu - utilities - terminal Note the mount points for both USB sticks, I will assume they are /Volumes/usb1 and /Volumes/usb2 (use disk utility to find out) Verify and repair usb2 if needed in disk utility using the first aid panel app on the end)Įject the usb drive (usb2) and plug it into the mac Rename the top most folder from ' Install OS X Yosemite.app' to ' Install OS X Yosemite' (the next folder in should have the. Unzip the provided zip directly onto the usb, it takes awhile. Use hfs+ to mount it if you can't see it in windows explorer. Still in disk utility, right click on usb2 and eject it. You will need to boot the Mac into recovery, open disk utility and partition both thumb drives with the guid partition table (name them usb1 and usb2 as I will be referring to them as such in following terminal commands) u/jackasstacular is the real MVR(edditor) here.Ģx 8 gigabyte thumb drives (16GB would be better)Ī Mac with disk utility and terminal (able to boot into recovery partition 10.10.5)Ī windows machine with paragon hfs+ installed, available hereĪ copy of the zip provided by /u/jackasstacular, here

My problem was, I formatted the partition OS X was on and the built in installer on the recovery partition was erroring out 'item unavailable' (my iCloud acct wasn't the original owner of this iMac and Yosemite isn't available to download from app store). My mac could still boot into its recovery partition with Yosemite 10.10.5, which has OS X Utilities, disk utility, safari, terminal, etc.

How to repair yosemite from dmg file using os x utilities