External hard drive to upgrade to El Capitan - big mistake! How to uninstall it?

I don't have a lot of space on my macbook, it gives the possibility, I put the upgrade on my external hard drive. Serious mistake. I can't uninstall - can anyone help?

Do you mean that you have installed El Capitan on the outside so that you can now start the external in El Capitan or you can't find the Setup file of El Capitan? If the first case, simply erase the external. If the latter, while the outside might be the target for the installation, the installer would always be in the Applications folder on the drive you started from, probably while downloading internally. You'd look in the Applications folder to "install OS X El Capitan."

Tags: Mac OS & System Software

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