Attendees wait in line outside San Francisco's Moscone centre ahead of Apple chief Tim Cook's keynote speech at the company's worldwide developer conference.
Apple introduced a new mobile operatng system iOS 7, hardware upgrades and a new operating system OS X Mavericks during the keynote address. The annual developer conference runs through June 14.
Apple CEO Tim Cook opens the event.
Apple senior vice president of worldwide product marketing, Phil Schiller, introduces the new Mac Pro.
Under the hood the Mac Pro boasts an Intel Xeon E5 chipset, up to 12 cores of processing power, up to 40GB/s of PCI Express gen 3 bandwidth, and 256-bit-wide floating-point instructions.
It also comes with new-generation Xeon processors, ultrafast memory, dual GPUs, PCI Express-based flash storage, and support for 4K video.
Apple has built everything around a single piece of extruded aluminum designed to maximise airflow as well as thermal capacity. It works by conducting heat away from the CPU and GPUs and distributing that heat uniformly across the core.
The Mac Pro can easily sit on a desk, measuring 25 centimetres high and 16.7 centimetres wide.
Attendees wait in line outside San Francisco's Moscone centre ahead of Apple chief Tim Cook's keynote speech at the company's worldwide developer conference.