For of vSphere 6.0, use:
Downloading requires navigating legacy support portals, as this version reached its End of General Support on March 12, 2020. To ensure a high-quality and safe installation, it is critical to use official Broadcom (formerly VMware) channels rather than third-party mirror sites. Official Download Channels vsphere client 60 download high quality
Once logged in, hover over "Support & Services" and click "My Downloads." For of vSphere 6
If you cannot access the direct links above, you can often retrieve the client from your existing infrastructure: From your ESXi Host For of vSphere 6.0
If your search for "high quality" text was referring to blurry or poor-looking text within the vSphere Client interface, this is a known issue in older 6.0 builds due to the transition from Flash to HTML5.