![]() In Finder, go to Applications and look for the Sierra installation app. LION recovery update!) Make sure it is in your downloads folder.ĭownload the OS X Sierra or whatever latest version from AppStore. Keep everything in ~/Downloads folder.ĭetailed instruction quoted from the source with minor edits from myself: (the script file in Step 2 is also copy and pasted below this quote for completeness)ĭownload the Lion Recovery Update from. This instruction involves downloading Lion Recovery Update 1.0, and a shell script (you can create your own with the contents copy-pasted from below), and also an image of the latest OS X (in my case OS X Sierra 10.12.2) and copying a file from that downloaded image. ![]() Read the first post in this thread, written by 'tywebb13'. Long time ago, I searched for a solution and found this post which solved this problem. Every time I update the OS the recovery partition is left untouched, or at least it appears to be. Once your bootable USB installation media is ready, remove it and insert it into your Mac, power it on, hold down the Option key, and select the USB you just created to reinstall Mac OS X.This applies to OS X Sierra also. Depending on your computer and other variables, it could take one or two hours to complete the process. Use the Restore Disk Image to Drive dialog box to browse for the DMG file with the installation files for Mac OS X Yosemite in this case, and click the OK button to create a bootable USB of the operating system. In the warning dialog box, click the Yes button. On the left pane, you’ll see all the Windows PC drives listed right-click the USB drive you intend to use to reinstall Apple’s OS X and select the Restore with Disk Image option. (You’ll be prompted to Enter Key or Run because we’ll be using it once, click the Run option.) Right-click the TransMac software icon and Run as administrator. Make sure you take off any important documents.) (Remember that all the data in the USB will be erased. Insert the USB drive that you’ll use to fix your installation of OS X. (If you want to support the developer, you can purchase the full version.) Quick note: TransMac is a paid software, but it has a 15-day trial solution that gives us more than enough time to move the DMG files to the USB drive from Windows.
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