https://stackoverflow.com/questions/16047306/how-is-docker-different-from-a-virtual-machine/36368012#36368012

"Docker for Mac uses https://github.com/moby/hyperkit to emulate the hypervisor capabilities and Hyperkit uses hypervisor.framework in its core. Hypervisor.framework is Mac's native hypervisor solution. Hyperkit also uses VPNKit and DataKit to namespace network and filesystem respectively."

hmmm I guess this is why docker on mac uses a lot of resources compared to its linux version

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How is Docker different from a virtual machine?

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