Go - how can i detect if the users PC is running some prerequisite tools such as Google Chrome for example

How can i be 100% sure and check with Go execution of my application that 1, 2 gives me true or false

1. Operating system Windows XP, Vista, 7, 8, 32/64-bit OK
   if that PC already have Google Chrome browser installed or not?

2. Operating system Mac/Apple, does it has Google Chrome browser Yes or not?

   package main
   import "os/exec"
   import "runtime"
   import "fmt"
   import "net/http"
   const url = "http://localhsot:9090"

   func main() {
   myos := runtime.GOOS // linux, freebsd, netbsd, openbsd, plan9, darwin, windows
   fmt.Println (runtime.GOARCH) // 386, amd64, arm

   if myos == "windows" {
   if myarch == "386" {
   chrome := "C:/Program Files/Google/Chrome/Application/chrome.exe"
   } else {
   chrome := "C:/Program Files (x86)/Google/Chrome/Application/chrome.exe"
   }
   cmd := exec.Command(chrome, "--chrome-frame", url)
   err := cmd.Start()
   if err != nil {
   println("Failed to start chrome:", err)
   }

   } else if myos == "darwin" {
   if myarch == "386" {
   cmd := exec.Command("open", "-b" , "com.google.Chrome", "--args", "--chrome-frame", url)
   } else {
   cmd := exec.Command("open", "-b" , "com.google.Chrome", "--args", "--chrome-frame", url)
   }
   err := cmd.Start()
   if err != nil {
   fmt.Println("failed")
   }

   } else {
   if myarch == "386" {
   chrome := "google-chrome"
   } else {
   chrome := "google-chrome"
   }

    cmd := exec.Command(chrome, "--chrome-frame", url)
   err := cmd.Start()
   if err != nil {
   fmt.Println("failed")
   }
   

   }

   }

In Windows,

Win 7 and high:

You can use "HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\Google Chrome" to find out install path. This actually coming from "Google Chrome" key found at "HKEY_LOCAL_MACHINE\SOFTWARE\RegisteredApplications".

Win XP to vista:

You could read from "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall\Google Chrome". This location i have not verified, please do check if you have xp machine.

For Mac:

You can find chrome install location using chrome's bundle identifier (you could find this from info.plist).