There are a couple of options with an erased partition.We have instructions for making a bootable installer with macOS Sierra (as well as archived versions for several previous releases).
Accidentally Deleted Audio Mac To DownloadThe article includes instructions on obtaining the installer, which might involve you having to use someones else Mac to download it, if you dont have a replacement Mac on hand yet. ![]() In that mode, when you choose to reinstall without erasing the drive, my recollection is that Recovery looks for the current OS system installer on your startup disk in the Applications folder, and uses that. Apple doesnt document that, and I havent had to test that for years.) Failing finding it, Recovery downloads the currently installed version of macOS (or OS X), which is about 5GB. When complete, it installs it and reboots, and places the installer in the Applications folder. However, theres yet another option: macOS Recovery over the Internet, which requires either a Mac model released in 2012 or later, or most 2010 and 2011 models with a firmware upgrade applied. Accidentally Deleted Audio Full MacOS InstallerThere, the Mac reaches out over a Wi-Fi or ethernet connection to download the relatively modest Recovery software, which then bootstraps the download of the full macOS installer. Apple says Internet-based Recovery should happen automatically on supported models, and you should see a spinning globe when that mode is invoked while the download occurs. However, if you have normal Recovery installed and it refuses to install macOS for some reason, you can manually invoke Internet Recovery. While Command-R at startup always installs whatever the most recent version you installed on your Mac, holding down Command-Option-R brings down the very latest compatible version that can be installed. Ask Mac 911 Weve compiled a list of the questions we get asked most frequently along with answers and links to columns: read our super FAQ to see if your question is covered. ![]() Mac 911 cant reply tonor publish an answer toevery question, and we dont provide direct troubleshooting advice. Accidentally Deleted Audio How To Make TheWe give you the scoop on whats new, whats best and how to make the most out of the products you love.
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