I have tried to up grade to El Captian on Macbook pro 17 inch. It says OS X could not be installed on your computer. File system verify or repair failed. How can i just go back to old system for now.
MacBook Pro (17-inch Early 2009)
To go back:
- backup your data
- Download the appropriate OSX installer. They should be listed in the Purchased section of the Mac App Store if you previously downloaded them with the ID you are using.
- Make a bootable USB media using the following:
- Boot from that media
- Format the startup disk and install OSX from the bootable media
- Restore your data
If you can't download the installer the boot to Recovery
OS X: About OS X Recovery - Apple Support
and backup your data. You can use Disk Utility to restore the currant installation to an external disk
Disk Utility (El Capitan): Restore a disk image to a disk
Then use Disk Utility and try to repair the HD. If it can be repaired format the HD and install OSX via Recovery.
Then restore your data
how can i stop OS X installer and go back
