Much like MacBook Airs, Apple’s recently released Retina MacBook Pros have the following hardware limitations: no Ethernet port, no FireWire 800 port, no CD/DVD drive, non-upgradable RAM, and no Kensington lock port.

The Retina MacBook Pros do however come with two Thunderbolt ports, two USB 3 ports, a SDXC card slot, and an HDMI port. Apple sells a Thunderbolt to Gigabit Ethernet adapter for $29, and they are advertising that a Thunderbolt to FireWire adapter will be available “in July”, also for $29.

Third-party security cable locking solutions are now available for Retina MacBook Pros, including TechSafe’s cable lock system, and Maclock’s security case.