11/9/2023 0 Comments Yosemite bootable usb for mac![]() I needed to upgrade my sister’s 2008 Macbook Pro and found that the existing Mac OS X 10.6 Snow Leopard did not support the “createinstallmedia” tool I got a “Failed to start erase of disk due to error (-9999, 0)” error. Update 2: The instructions below will work to manually create a Mac OS X 10.11 El Capitan USB installation drive. Update: Go to Install macOS Sierra Using Bootable USB Flash Drive if you want to install macOS 10.12 Sierra instead. ![]() ![]() Download the Yosemite installer from the Mac App Store and make sure it’s in your main Applications folder (/Applications)-it’s called Install OS X Yosemite.app. Download create-bootable-installer-for-os-x-el-capitan.sh to the USB drive Boot into Recovery Mode Insert the USB drive. How to create a bootable OS X Yosemite drive! You can perform clean installations easily and install this version of OS X on other Macs! Sudo Command: sudo /.
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