diff --git a/README.md b/README.md
index 97bc906..492f3e4 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ Yes, macOS have optimized battery charging. It will try to find out your chargin
 
 > Currently, it is command-line only. Some knowledge of the command-line is recommended. A native GUI is possible but not planned. If you want to build a GUI, you can ask me to put a link here to your project 
 
-1. (Optional) If you are lazy, there is an installation script to help you get the first 3 steps done (Internet connection required). Put this in your terminal: `curl -fsSL https://github.com/charlie0129/batt/raw/master/hack/install.sh | bash`. You may need to provide your password (to control charging). This will download and install the latest _stable_ version for you, then you can skip to step 5.
+1. (Optional) If you are lazy, there is an installation script to help you get the first 3 steps done (Internet connection required). Put this in your terminal: `bash <(curl -fsSL https://github.com/charlie0129/batt/raw/master/hack/install.sh)`. You may need to provide your password (to control charging). This will download and install the latest _stable_ version for you, then you can skip to step 5.
 2. Get the binary. For _stable_ and _beta_ releases, you can find the download link in the [release page](https://github.com/charlie0129/batt/releases). If you want development versions with the latest features and bug fixes, you can download prebuilt binaries from [GitHub Actions](https://github.com/charlie0129/batt/actions/workflows/build-test-binary.yml) (has a retention period of 3 months and you need to `chmod +x batt` after extracting the archive) or [build it yourself](#building) .
 3. Put the binary somewhere safe. You don't want to move it after installation :). It is recommended to save it in your `$PATH`, e.g., `/usr/local/bin`, so you can directly call `batt` on the command-line. In this case, the binary location will be `/usr/local/bin/batt`.
 4. Install daemon using `sudo batt install`. If you do not want to use `sudo` every time after installation, add the `--allow-non-root-access` flag: `sudo batt install --allow-non-root-access`. To uninstall: please refer to [How to uninstall?](#how-to-uninstall)
@@ -177,7 +177,7 @@ Automatic:
 > Updates to the latest _stable_ version. If you want to use other versions (_beta_, _development_), please use the manual method.
 
 ```bash
-curl -fsSL https://github.com/charlie0129/batt/raw/master/hack/install.sh | bash
+bash <(curl -fsSL https://github.com/charlie0129/batt/raw/master/hack/install.sh)
 ```
 
 Manual:
diff --git a/cmd.go b/cmd.go
index 30f1432..4513a3f 100644
--- a/cmd.go
+++ b/cmd.go
@@ -668,10 +668,13 @@ One thing to note: this option is purely cosmetic. batt will still function even
 }
 
 func bool2Text(b bool) string {
+	var c string
 	if b {
-		return color.New(color.Bold, color.FgGreen).Sprint("✔")
+		c = "✔"
+	} else {
+		c = "✘"
 	}
-	return bold("✘")
+	return bold(c)
 }
 
 func bold(format string, a ...interface{}) string {
diff --git a/hack/install.sh b/hack/install.sh
index 99ad964..5cf05e3 100755
--- a/hack/install.sh
+++ b/hack/install.sh
@@ -14,23 +14,15 @@ confirm() {
     echo -n "$1 [y/n]: "
     read -r -n 1 REPLY
     case $REPLY in
-    [y])
+    [yY])
       echo
       return 0
       ;;
-    [n])
+    [nN])
       echo
       return 1
       ;;
-    [Y])
-      echo
-      return 0
-      ;;
-    [N])
-      echo
-      return 1
-      ;;
-    *) printf "invalid input" ;;
+    *) printf " is invalid. Press 'y' to continue; 'n' to exit. \n" ;;
     esac
   done
 }
@@ -43,6 +35,8 @@ launch_daemon="/Library/LaunchDaemons/cc.chlc.batt.plist"
 
 # Uninstall old versions (if present)
 if [[ -f "$launch_daemon" ]]; then
+  echo "You have old versions of batt installed, which need to be uninstalled before installing the latest version. We will uninstall it for you now."
+  confirm "Is this OK?" || exit 0
   info "Stopping old versions of batt..."
   sudo launchctl unload "$launch_daemon"
   sudo rm -f "$launch_daemon"
@@ -70,7 +64,7 @@ if [[ -z "$PREFIX" ]]; then
 fi
 
 echo "Will install batt ${version} to $PREFIX (to change install location, set \$PREFIX environment variable)."
-confirm "Continue?" || exit 0
+confirm "Ready to install?" || exit 0
 info "Downloading batt ${version} from $tarball_url and installing to $PREFIX..."
 sudo mkdir -p "$PREFIX"
 curl -fsSL "$tarball_url" | sudo tar -xzC "$PREFIX"