I can't open XCode 6.4 on El Capitan. The icon has the disabled mask over it, and every time I click it I reviece an alert: 'The version of Xcode installed on this Mac is not compatible with OS X El Capitan. You have “Xcode” 6.4. Download version 6.4 for free from the Mac App Store.'
I must say the OS updates in Mac OS X aren's triggering me so much anymore as they used to. Recently updated to 10.10 only because I needed to do that to run the latest version of Xcode. If you are running an older version of macOS, head to and download Xcode 8.2 for Mac OS X 11.11 (El Capitan), Xcode 6.4 for Mac OS X 10.10 (Yosemite), Xcode 5.1.1 for Mac OS X 10.9 (Mavericks) or Xcode 4.6.3 for either Mac OS. Oct 29, 2015 As such, I'm using Xcode 6.4 right now which uses old version of Swift. The El Capitan is due to be released soon, and I was wondering if older Xcode versions will still run on the El Capitan. I read different opinions about it, and some suggested some fixes, but I'm not sure if.
Does anyone else have this issue? Did anyone else figure out how to fix it? I already tried deleting XCode and reinstalling it from the Mac App Store. I am definitely running XCode 6.4 as the alert says is required, but it won't open.
Check compatibility
You can upgrade to OS X El Capitan from OS X Snow Leopard or later on any of the following Mac models. Your Mac also needs at least 2GB of memory and 8.8GB of available storage space.
MacBook introduced in 2009 or later, plus MacBook (13-inch, Aluminum, Late 2008)
MacBook Air introduced in late 2008 or later
MacBook Pro introduced in mid 2007 or later
Mac mini introduced in early 2009 or later
iMac introduced in mid 2007 or later
Mac Pro introduced in early 2008 or later
Xserve models introduced in early 2009
To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . If your Mac isn't compatible with OS X El Capitan, the installer will let you know.
Make a backup
Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.
Get connected
It takes time to download and install OS X, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download OS X El Capitan
For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of macOS.
If you still need OS X El Capitan, use this link: Download OS X El Capitan. A file named InstallMacOSX.dmg will download to your Mac.
Install the macOS installer
Double-click the downloaded file to open a window showing its contents. Then double-click the file within, named InstallMacOSX.pkg.
Xcode 10 El Capitan
Follow the onscreen instructions, which will guide you through the steps necessary to install.
Begin installation
After installation of the installer is complete, open the Applications folder on your Mac, then double-click the file named Install OS X El Capitan.
Xcode 9 El Capitan
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
Xcode Version For El Capitan
Allow installation to complete
Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both OS X and related updates to your Mac firmware.
Learn more
- OS X El Capitan won't install on top of a later version of macOS, but you can erase your disk first or install on another disk.
- You can use macOS Recovery to reinstall macOS.