Mac 911 cannot reply to email with troubleshooting advice nor can we publish answers to every question. We’re always looking for problems to solve! Email yours to including screen captures as appropriate. Patrick has the Yosemite installer, but if you need an older installer, you can launch App Store on a Mac and then use the Purchased tab to scroll down and find older releases-they don’t show up by searching.
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Since this isn’t working for Patrick, the better course is to create on another Mac a bootable Yosemite installer following Dan Frakes’ instructions. The App Store keeps old OS X installers available under the Purchased tab.
#How to repair an imac operating system install#
If that had worked, you could install that older OS, then copy the Yosemite installer, and use it to upgrade, although an intermediate OS X installation might even be required. With an erased 2009 MacBook Pro, as Patrick has, he can’t use Internet Recovery, which will reinstall the original operating system that came with the Mac. Patrick should therefore be prompted to install Yosemite. Recovery will reinstall the same version of OS X that was on your Mac, even though it’s been erased.
#How to repair an imac operating system how to#
It describes how to use the System File Checker tool to scan and replace system files in scenarios where you are troubleshooting an issue in Windows Vista. However, after he booted into OS X Recovery (holding down Command-R at startup), he was only offered the option to download OS X through the App Store, and Yosemite wasn’t an option. This article discusses how to repair the operating system and how to restore the operating system configuration to an earlier point in time in Windows Vista. Patrick Atis securely wiped his drive, and then wanted to reinstall Yosemite, the installer for which he has on an external hard drive.
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