Is your Mac up to date with the latest version of the Mac operating system? Is it using the version that is required by a product you want to use with your Mac? Which versions are earlier (older) or later (newer, more recent)? To find out, check which version is installed now.

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1. The first version of Mac OS X, Mac OS X Server 1.0, was a transitional product, featuring an interface resembling the classic Mac OS, though it was not compatible with software designed for the older system. Consumer releases of Mac OS X included more backward compatibility.
2. I created a VMware Fusion Virtual Machine and upgraded the virtual OS X 10.8.6 install to macOS 10.13.x. I then on the virtual machine downloaded the full macOS 10.13.4 installer from the App Store and created the USB Installer from it. I then booted my Mac from the macOS 10.13.4 USB Installer and installed macOS 10.13.4 onto an external drive.
3. Find games for macOS like Friday Night Funkin', Cold Shot, Dying of Thirst, Wrong Floor, Tidetale on itch.io, the indie game hosting marketplace.
4. In this Video I am showing you the method to install MacOS (Hackintosh) on any Windows PC without need of mac support officially. Note: This video is total.

General troubleshooting steps for OS X. When troubleshooting Mac problems it helps to be able to isolate where the problem is occurring. Here are some steps to follow that can help you do this.

If your macOS isn't up to date, you may be able to update to a later version.

Which macOS version is installed?

From the Apple menu  in the corner of your screen, choose About This Mac. You should see the macOS name, such as macOS Big Sur, followed by its version number. If you need to know the build number as well, click the version number to see it.

Which macOS version is the latest one?

These are all Mac operating systems, starting with the most recent. When a major new macOS is released, it gets a new name, such as macOS Big Sur. As updates that change the macOS version number become available, this article will be updated to show the latest version of that macOS.

If your Mac is using an earlier version of any Mac operating system, you should install the latest Apple software updates, which can include important security updates and updates for the apps that are installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar and Photos.

Not Hog Mac Os Catalina