These instructions are specific to the vSphere 6.5 VCSA installation. The 6.0 installation is done through a web page, but the steps are similar. Here are the steps to install PSC on your ESXi host:

1. Download the VCSA ISO file from http://www.vmware.com/download.
2. Mount the ISO file once it is downloaded.
3. Using the CD, open the vcsa-ui-installer folder.
4. Open the subfolder called win32. If you are running the installer on Linux or Mac, open the appropriate folder.
5. Double-click on installer.exe.
6. Click on Install.
7. Click on Next, then read and accept EULA and click Next.
8. Select the deployment type, click on Platform Services Controller under External Platform Services Controller. Click on Next.
9. Enter the FQDN, login, and password details of the ESXi host where you want to deploy PSC. Click on Next.
10. Enter the name and root password of your PSC and click Next.
11. Choose the datastore where you want this VM to be stored. Enable thin disk mode if desired. Click on Next.
12. Enter networking information and click Next.
13. Review the settings and click Finish.
14. When the installation is done, click Finish.

The PSC appliance installation will take 10-15 minutes. Once it is done, follow these instructions to continue the setup:

1. Open a web browser and navigate to https://<PSC IP address>:5480.
2. Click on the Setup Platform Services Controller Appliance link.
3. Enter the root password from the preceding setup and click on Log in.
4. Verify that stage 1 has completed and click Next.
5. Enter NTP server(s). Review the network settings and change if necessary. Click on Next.
6. Decide whether you want to join an SSO domain or create a new one. Fill out the SSO information. Click on Next.

7. Decide whether you want to join Customer Experience Improvement Program (CEIP) and click Next.
8. Review the settings and click Finish.

This step will take another 5-10 minutes to complete. Once done, you will receive a notification and the appliance management page:

When you log into the appliance page, all the health statuses should be green and the SSO domain should be running: