The process for a has changed significantly due to Broadcom's acquisition of VMware and the product reaching its official end-of-life (EOL). Official Download Status
4e1f2b3c5d6a7e8f9a0b1c2d3e4f5a6b (Hypothetical – obtain real values from VMware documentation)1234567890abcdef1234567890abcdef12345678: Hewlett Packard Enterprise (HPE) provides custom images that include specific drivers for ProLiant hardware. vmware esxi 5.5 iso download
Finding a legitimate is increasingly difficult following the Broadcom acquisition of VMware. Since ESXi 5.5 is more than a decade old and officially unsupported, it has been removed from most public-facing general download pages. Where to Find VMware ESXi 5.5 ISO Downloads VMware ESXi 5