Downloading the VMware ESXi 5.5 ISO has become significantly more difficult following the acquisition by Broadcom and the end-of-life status for vSphere 5.5. Because general support ended in 2018, official downloads are primarily restricted to historical archives or specific vendor support portals. Direct Download Sources
: Dell still hosts legacy ESXi 5.5 images specifically optimized for their PowerEdge servers. You can find them on the Dell Support site . download vmware esxi 5.5 iso
ESXi 5.5 has a very old driver set. It does not support: Downloading the VMware ESXi 5
To access the legacy download section, you need a customer account. you need a customer account.