azure-storage-azcopy: No build links and can't build for MacOS

Hi

I first reported this here https://github.com/MicrosoftDocs/azure-docs/issues/13735#issuecomment-416680950

And am now moving it to this repo as it is more appropriate.

The readme suggests that there should be links for 3 downloads

Download the AzCopy executable using one of the following links:

Windows x64
Linux x64
MacOS x64

But there are no links, so I attempted to build on MacOS myself. Having no experience with GO, I installed Go and added one by one the respective dependencies until I encountered the following error.

common/credCache_darwin.go:28:2: cannot find package "github.com/jiacfan/keychain" in any of:
        /usr/local/opt/go/libexec/src/github.com/jiacfan/keychain (from $GOROOT)
        /Users/hrant/go-workspace/src/github.com/jiacfan/keychain (from $GOPATH)
cmd/cancel.go:28:2: cannot find package "github.com/spf13/cobra" in any of:
        /usr/local/opt/go/libexec/src/github.com/spf13/cobra (from $GOROOT)
        /Users/hrant/go-workspace/src/github.com/spf13/cobra (from $GOPATH)
common/credCache_linux.go:26:2: cannot find package "github.com/jiacfan/keyctl" in any of:
        /usr/local/opt/go/libexec/src/github.com/jiacfan/keyctl (from $GOROOT)
        /Users/hrant/go-workspace/src/github.com/jiacfan/keyctl (from $GOPATH)
cmd/cancel.go:28:2: cannot find package "github.com/spf13/cobra" in any of:
        /usr/local/opt/go/libexec/src/github.com/spf13/cobra (from $GOROOT)
        /Users/hrant/go-workspace/src/github.com/spf13/cobra (from $GOPATH)
cmd/cancel.go:28:2: cannot find package "github.com/spf13/cobra" in any of:
        /usr/local/opt/go/libexec/src/github.com/spf13/cobra (from $GOROOT)
        /Users/hrant/go-workspace/src/github.com/spf13/cobra (from $GOPATH)

I can’t find github.com/jiacfan/keychain to add that dependency. Please kindly either provide links for builds or advise on a proper building steps.

Many thanks in advance