The installation requires the entire physical host to be rebooted
PREREQUISITES
■ IPMI: ensure you have access to the IPMI interface for remote management;
■ ISO: download the correct ISO file based on the versions of SynetoOS you want to install
→ SynetoOS 4.7.4 (2733) + VMware ESXi 6.7.0 (17499825)
→ SynetoOS 4.8.6 (4777) + VMware ESXi 7.0U3p (23307199)
→ SynetoOS 5.4.0 (4869) + VMware ESXi 7.0U3q (23794027)
→ SynetoOS 5.4.1 (5266) + VMware ESXi 7.0U3s (24585291)
→ SynetoOS 5.4.1 (5266) + VMware ESXi 8.0U3d (24585383)
→ SynetoOS 6.0.0 (6486) + VMware ESXi 7.0U3w (24784741))
→ SynetoOS 6.0.0 (6486) + VMware ESXi 8.0U3f (24784735)
Step 1. Set the IPMI session timeout to 0 ("How to Set the IPMI Session Timeout to 0")
Step 2. Shut down all VMs and VMware ESXi system
Step 3. Run the ISO from IPMI ("How to Mount an ISO via IPMI")
Step 4. Select the newly mounted ISO via IPMI and boot it up
Step 5. Wait for VMware ESXi installation to finish (about 1 hour)

Step 6. Login to VMware ESXi GUI (replace <your_ip_address_or_hostname> with the correct ip/hostname)
https://<your_ip_address_or_hostname>