I'd read about any caveats first. The EdgeRouter, for example, has Cavium hardware offload that requires a proprietary kernel module. It's much slower without that.
1. If I click my mouse to drag and select what I want to copy, the selection is copied to the clipboard when I release. Selection is highlighted with a yellow background.
2. If I want to double-click to copy, I just hold down the `option` key, then double click and it is copied to the clipboard. Selection is highlighted with a white background.
In both instances, I don't even need to use `ctrl+c`.