diff --git a/lib/declarations.ts b/lib/declarations.ts
index 707938e..33fa51a 100644
--- a/lib/declarations.ts
+++ b/lib/declarations.ts
@@ -28,6 +28,7 @@ interface IDevice {
 
 interface ISimctl {
 	launch(deviceId: string, applicationIdentifier: string): string;
+	terminate(deviceId: string, appIdentifier: string): string;
 	install(deviceId: string, applicationPath: string): void;
 	uninstall(deviceId: string, applicationIdentifier: string, opts?: any): void;
 	notifyPost(deviceId: string, notification: string): void;
@@ -49,7 +50,7 @@ interface ISimulator extends INameGetter {
 	installApplication(deviceId: string, applicationPath: string): void;
 	uninstallApplication(deviceId: string, appIdentifier: string): void;
 	startApplication(deviceId: string, appIdentifier: string): string;
-	stopApplication(deviceId: string, appIdentifier: string): string;
+	stopApplication(deviceId: string, appIdentifier: string, bundleExecutable: string): string;
 	printDeviceLog(deviceId: string, launchResult?: string): any;
 	getDeviceLogProcess(deviceId: string): any;
 	startSimulator(): void;
diff --git a/lib/iphone-simulator-xcode-simctl.ts b/lib/iphone-simulator-xcode-simctl.ts
index 314b766..3098836 100755
--- a/lib/iphone-simulator-xcode-simctl.ts
+++ b/lib/iphone-simulator-xcode-simctl.ts
@@ -87,9 +87,26 @@ export class XCodeSimctlSimulator extends IPhoneSimulatorNameGetter implements I
 		return this.simctl.launch(deviceId, appIdentifier);
 	}
 
-	public stopApplication(deviceId: string, cfBundleExecutable: string): string {
+	public stopApplication(deviceId: string, appIdentifier: string, bundleExecutable: string): string {
 		try {
-			return childProcess.execSync(`killall ${cfBundleExecutable}`, { skipError: true });
+			let xcodeMajorVersion: number = null;
+			try {
+				const xcodeVersion = xcode.getXcodeVersionData();
+				xcodeMajorVersion = +xcodeVersion.major;
+			} catch(err) {
+				// Ignore the error.
+			}
+
+			if (xcodeMajorVersion && xcodeMajorVersion < 8) {
+				// Xcode 7.x does not have support for `xcrun simctl terminate` command
+				const resultOfKill = childProcess.execSync(`killall ${bundleExecutable}`, { skipError: true });
+				// killall command does not terminate the processes immediately and we have to wait a little bit,
+				// just to ensure all related processes and services are dead.
+				utils.sleep(0.5);
+				return resultOfKill;
+			} else {
+				return this.simctl.terminate(deviceId, appIdentifier);
+			}
 		} catch (e) {
 		}
 	}
@@ -157,11 +174,11 @@ export class XCodeSimctlSimulator extends IPhoneSimulatorNameGetter implements I
 			// startSimulaltor doesn't always finish immediately, and the subsequent
 			// install fails since the simulator is not running.
 			// Give it some time to start before we attempt installing.
-			utils.sleep(1000);
+			utils.sleep(1);
 		}
 	}
 
 	private killSimulator(): void {
 		childProcess.execSync("pkill -9 -f Simulator");
 	}
-}
\ No newline at end of file
+}
diff --git a/lib/simctl.ts b/lib/simctl.ts
index b3841ee..efc94d7 100644
--- a/lib/simctl.ts
+++ b/lib/simctl.ts
@@ -27,6 +27,10 @@ export class Simctl implements ISimctl {
 		return result;
 	}
 
+	public terminate(deviceId: string, appIdentifier: string): string {
+		return this.simctlExec("terminate", [deviceId, appIdentifier]);
+	}
+
 	public install(deviceId: string, applicationPath: string): void {
 		return this.simctlExec("install", [deviceId, applicationPath]);
 	}
diff --git a/lib/utils.ts b/lib/utils.ts
index 7de7273..206e33e 100644
--- a/lib/utils.ts
+++ b/lib/utils.ts
@@ -1,3 +1,5 @@
+import * as childProcess from "./child-process";
+
 export function stringify(arr: string[], delimiter?: string): string {
 	delimiter = delimiter || ", ";
 	return arr.join(delimiter);
@@ -8,10 +10,6 @@ export function getCurrentEpochTime(): number {
 	return dateTime.getTime();
 }
 
-export function sleep(ms: number): void {
-	let startTime = getCurrentEpochTime();
-	let currentTime = getCurrentEpochTime();
-	while ((currentTime - startTime) < ms) {
-		currentTime = getCurrentEpochTime();
-	}
-}
\ No newline at end of file
+export function sleep(seconds: number): void {
+	childProcess.execSync(`sleep ${seconds}`);
+}
diff --git a/lib/xcode.ts b/lib/xcode.ts
index b3dd2e2..d9fedf0 100644
--- a/lib/xcode.ts
+++ b/lib/xcode.ts
@@ -6,11 +6,11 @@ export function getPathFromXcodeSelect(): string {
 
 export function getXcodeVersionData(): IXcodeVersionData {
 	let rawData = childProcess.execSync("xcodebuild -version");
-	let lines = rawData.split("\n");
+	let lines = rawData.toString().split("\n");
 	let parts = lines[0].split(" ")[1].split(".");
 	return {
 		major: parts[0],
 		minor: parts[1],
 		build: lines[1].split("Build version ")[1]
 	}
-}
\ No newline at end of file
+}
diff --git a/package.json b/package.json
index e054479..4c4d193 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ios-sim-portable",
-  "version": "2.0.2",
+  "version": "3.0.0",
   "description": "",
   "main": "./lib/ios-sim.js",
   "scripts": {