Opening and Editing CorelDraw Files on MacOS Sierra
You can check out this free option: CDRViewer. It will allow you to open/view CorelDraw files.

For more advanced functionality, the same developers offer PrintLab Studio 3.

You can also visit the developer's direct website at: http://blue-tail.com

NOTE: I have no affiliation whatsoever with the developer or this product.

[EDIT]

Just thought I should add that Adobe Illustrator has always been capable of opening CorelDraw files. I mention this in case you already have access to Illustrator and didn't realise it supported this.