To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac.
In addition, future versions of Steam will require macOS feature and security updates only present in macOS 10.11 ('El Capitan') and above. Mac OS 10.10 'Yosemite' was released in 2014 and was. Question: Q: Steam games on my Mac have stopped working Only recently, and I'm not sure why (could possibly be Steam updated) my computer can no longer run any Steam games. My computer is an old Mac Pro running on Yosemite, but even being so old it should be okay to run this stuff.
Learn how to upgrade to macOS Big Sur, the latest version of macOS.
Check compatibility
If a macOS installer can't be used on your Mac, the installer will let you know. For example, it might say that your Mac doesn't have enough free storage space for the installation, or that the installer is too old to be opened on this version of macOS.
If you want to check compatibility before downloading the installer, learn about the minimum requirements for macOS Catalina, Mojave, High Sierra, Sierra, El Capitan, or Yosemite. You can also check compatible operating systems on the product-ID page for MacBook Pro, MacBook Air, MacBook, iMac, Mac mini, or Mac Pro.
Make a backup
Before installing, 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.
Download macOS
It takes time to download and install macOS, so make sure that you're plugged into AC power and have a reliable internet connection.
These installers from the App Store open automatically after you download them:
- macOS Catalina 10.15 can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks
- macOS Mojave 10.14 can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
- macOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion
Your web browser downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.
- macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion
- OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard
- OS X Yosemite 10.10can upgrade Mavericks, Mountain Lion, Lion, or Snow Leopard
Install macOS
Follow the onscreen instructions in the installer. It might be easiest to begin installation in the evening so that it can complete overnight, if needed.
If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.
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 macOS and related updates to your Mac firmware.
Learn more
You might also be able to use macOS Recovery to reinstall the macOS you're using now, upgrade to the latest compatible macOS, or install the macOS that came with your Mac.
Fix issues with El Capitan, to run old STEAM games
I recently purchased the 3D Realms (Apogee) Anthology pack on STEAM (which I’ve started vlogging about as well). Although most games run just fine, there’s a few games that just wouldn’t start.
When starting a game you’d get a message along the lines of:
[code]An error occurred while starting the X11 server: “Failed to activate core devices.”[/code]
The solution to resolve this on your Mac OS X El Capitan is quite simple actually, it has to do with ‘rootless’ (System Integration Protection) which is a protection by your Mac system that disables programs to write/change files in critical system directories. That is obviously a good thing normally!
Disabling this is quite simple (although be aware, there’s a reason that your Mac protects these directories; there’s a risk involved in disabling this. Only keep disabled when playing certain games and re-enable when you’re done!).
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- Shut down your Mac
- Power it up, while pressing and holding CMD + R (not the +)
- It will boot into OS X Recovery mode
- Once this shows up, click “Utilities” (top menu) and choose “Terminal”
- In the terminal enter the following command
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[code]csrutil disable; reboot[/code]
How To Play Pc Steam Games On Mac El Capitan 10.11
Your Mac will reboot and you’ll have disabled the System Integration Protection. The games will run just fine after this. If you at one point want to turn it back on, simply do the same steps and type in “csrutil enable” instead of disable.
Again, remember, this is an advanced setting on your Mac and generally speaking you should not disable this.
How To Play Pc Steam Games On Mac El Capitan Dmg
Keep on playing! 🙂