macos 如何在 Cocoa 中禁用 Macbook Pro 切换到高性能显卡？
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How to disable Macbook Pro from switching to a high performance graphics card in Cocoa?
提问by Alexey Blinov
All 2010 Macbook Pros come with two graphics cards — a low-performance built-in Intel HD one and a high-performance discrete NVIDIA one — and it switches between them on the fly depending on the needs of the running applications.
所有 2010 款 Macbook Pro 都配备了两个显卡——一个是低性能的内置 Intel HD 显卡，一个是高性能的独立 NVIDIA 显卡——它可以根据运行应用程序的需要在它们之间即时切换。
I have a simple Cocoa application that consists of just a menu bar item with a NSTextFieldin it. All I do is update the text field with an NSAttributedStringfrom time to time. The trouble is that my application switches my Macbook Pro to use the high-performance NVIDIA card (I used the gfxCardStatustool to confirm this).
我有一个简单的 Cocoa 应用程序，NSTextField它只包含一个带有 的菜单栏项。我所做的就是NSAttributedString不时更新文本字段。问题是我的应用程序将我的 Macbook Pro 切换为使用高性能 NVIDIA 卡（我使用gfxCardStatus工具确认了这一点）。
What could possibly need the high-performance card? Is there a known list of reasons for the applications to require high-performance graphics card? Is there a way to force the computer to use the discrete graphics card?
什么可能需要高性能卡？是否有已知的应用程序需要高性能显卡的原因列表？有没有办法强制电脑使用独立显卡？
回答by Thomas Zoechling
There is a good article about GPU switching in the newer MacBook Pros at Ars Technica. I noticed that OS X switches to the dedicated GPU if you
Ars Technica 上有一篇关于更新 MacBook Pro 中 GPU 切换的好文章。我注意到 OS X 会切换到专用 GPU，如果你
- Start an application that links against OpenGL
- Connect a second display
- 启动一个链接到 OpenGL 的应用程序
- 连接第二个显示器
The code of gfxCardStatus is open source. And it seems that the relevant part is located in switcher.m. You can take a closer look here.
gfxCardStatus 的代码是开源的。似乎相关部分位于 switcher.m 中。你可以在这里仔细看看。
回答by Alexp
In MacOS 10.7 you can specify a setting in the PList to stop going to discrete graphics:
在 MacOS 10.7 中，您可以在 PList 中指定一个设置以停止转到独立显卡：
https://developer.apple.com/library/mac/qa/qa1734/_index.html
https://developer.apple.com/library/mac/qa/qa1734/_index.html
Needs to be a 2011+ MacBook Pro.
需要是 2011 年以上的 MacBook Pro。
