Understanding Cautions using OpenCore Guide #2

Última atualização em January 22, 2025

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Introdução

Please read this guide before continuing, this is very, very important. You MUST know this information before installing OpenCore.

Most people will want to skip this guide, because it's boring. But you must understand the risks of using OpenCore before you actually begin to use it.
This guide will not cover every single Mac and every single issue, that would make this guide very, VERY long. So pay close attention so you understand what could happen to your Mac.

First, OpenCore is bound to not work at all. Just remember that.
There is a slim chance that OpenCore could corrupt your macOS installation, and you will have to go back to your previous version of macOS, which is not easy. This is why it is very important to make many Backups of your Mac.
Make a backup using Time Machine, not third party software. Time Machine is what we'll use if something bad happens to your Mac.
Also, make a bootable USB drive of your macOS (or OS X) version. So if something horrible happens, we can reinstall macOS easily, and start from the beginning.
2011 Macs and newer can reinstall macOS using Internet Recovery, so you do not need to make a bootable USB Drive. Although, if you feel more comfortable armed with one, you can never be too safe.
iFixit has a link to making these drives: Créer une clé USB bootable
Make sure you click "About This Mac" and find the version your Mac is running. This way you will know what version to download.

Graphics acceleration will more than likely be the main issue on your Mac. Graphics acceleration is something that OpenCore is still working on, so you will probably notice some minor bugs. Every year when a new version of macOS is released, the graphics are slightly faster on native Macs. So, older Macs can't keep up with the new technologies.
If there are going to be any issues with OpenCore on your Mac, it will more than likely be the graphics that struggle.
Graphics acceleration is the ability to animate objects, make windows translucent, blur objects, etc.
You can see the difference in graphics acceleration by the two pictures:

To avoid this as best as possible, you need to determine the power of your Mac:
Generally, all Macs from 2012 onward excluding the 2012 Mac Pro have Metal support.
If your Mac does NOT have metal graphics, you will be unable to smoothly run macOS Big Sur, Monterey, Ventura, Sonoma, and especially Apple's latest Operating System: Sequoia.
Thanks to the new versions of OpenCore, graphics acceleration without Metal graphics is nearly perfect. But, it is still not fully supported.

Here are the potential issues you will face:
No DRM Content. (This includes no DVD player, No DRM content online, no Music Videos from Apple Music, no Movies from the TV app, no photos curation, and no maps {maps do work on macOS Big Sur})
Glitchy apps and animations. (Especially in the Menu Bar. There will be several glitches when using apps with no Metal.)
Apps Unavailable: (Some apps are completely unavailable without Metal. {Such as Garage Band, iMovie, Photo Editors, etc.})
There are potential work-arounds for these issues, and I will release a guide covering the workarounds soon.

Legacy Metal
Even if your Mac has Metal Graphics, macOS 13+ (Ventura & Sonoma) have a new issue with Legacy Metal.
If you have a Mac in between 2012-2016, it will probably fall in this category.
The easiest way to tell thought is if you Mac supports macOS Ventura natively. If is does not, and you can only run macOS Monterey or older, you have legacy metal graphics.

USB 1.1
This issue only revolves around any Mac Pre-2009 running macOS Ventura, Sonoma, and Sequoia.
Apple dropped all support for any Mac that has USB 1.1. This includes Trackpad, Mouse, External USB, Bluetooth, and Infrared.
Because of this, running macOS Recovery is impossible, and therefore macOS 13+ cannot run on any Mac older than 2009.
The only workaround for this is to purchase a USB 2.0 (not 3.0) hub and connect an external mouse and keyboard to install macOS and eventually run root patching. Since there is currently no better option, it is recommended to stay off of macOS Ventura and newer.

Trackpad
OpenCore has not said this is an issue, but I have had some hiccups on my MacBook. Sometimes, the Trackpad Gestures randomly stop working.
This is an easy fix, though. I simply close the lid, wait a few seconds, and the gestures work just fine.

Other issues:
On rare occasions, there will be other issues that your Mac will face. In this case, you will need to refer to the troubleshooting guide of OpenCore: https://dortania.github.io/OpenCore-Lega...
Keep in mind that you. must install OpenCore correctly. If it does not work the first installation, try again. One missed step could cause the entire Mac to crash. So follow these steps very carefully.