Onyx for the Web Client
Products:

vSphere Web Client Version 6.0.0 Build 2559277 or vSphere Web Client Version 6.0.0 Build 2997665 (6.0 U1) as installed as part of vCenter for Windows or vCSA.
For vCenter 6.0 please download and use the onyx-setup-60.zip file, for vCenter 6.0 U1 please download and use the onyx-setup-60u1.zip file. For vCenter 6.0 U2 please download and use the onyx-setup-60u2.zip file.
For step-by-step, detailed instructions, including screenshots, please read the PDF.
vCenter Virtual Appliance (VCVA):
Copy the contents of the zip file to the vCenter Appliance machine (for example using WinSCP) to /root/onyx-setup
Note: To connect with WinSCP to vCA, use the SFTP protocol and set the SFTP server configuration for the connection to "shell /usr/lib64/ssh/sftp-server"
Open ssh session to the vCenter Appliance machine using the root user
Run the following commands:
cd /root/onyx-setup
chmod +x ./install.sh
./install.sh
vCenter on Windows:
Copy the contents of the zip file to a folder on the Windows machine where vCenter is running.
RDP to the machine running the Web Client
Open a PowerShell session on the Windows machine running vCenter using the Administrator user
CD into the folder where you have extracted the Fling zip
Run the following command:
./install.ps1
Updated for 6.0 U1