Docker not able to use all of Macbook's CPU cores

Question

I am currently using a Macbook Pro with i7, which has 8 cores. However, I am not able set the CPU cores to more than 1. When I run

docker run --cpus=2 "my-image"

I get the following error:

docker: Error response from daemon: Range of CPUs is from 0.01 to 1.00, as there are only 1 CPUs available.

What am I missing?

Wiliness

docker version? Do you have docker for mac?(the whale in the taskbar) – Shinbone

I'm using 17.05.0-ce – Wiliness

Click the whale and do what @Oliver answered – Shinbone

Answer 1

You need to increase the maximum number of CPUs available to containers in the Docker Server. In OS X you can find them in Preferences -> Advanced.

Unclose

For mac check the other answer – Optimistic

Answer 2

If you use Docker Desktop for Mac, you increase from the UI:

Brevity