VMware has released the first beta of Fusion 1.1, an updated virtualisation package that lets users run Windows on their Intel-powered Macs.

Fusion 1.1 will support 3D games that require DirectX 9.0, according to the release notes, as well as synchronising iPhones within Windows virtual machines.

The beta also upgrades Unity, the feature that lets users run Windows applications without displaying Windows itself. When an application is run in Unity mode, it looks and behaves like a Mac OS X window.

The update also fixes a number of bugs, including one that caused the host Mac's wireless connection to max out its CPU at 100 percent. Other fixes range from one that keeps the same time stamp on files dragged between Mac and a VM, to another that blocks a Mac kernel panic if an external drive containing the virtual machine is disconnected. VMware also posted a long list of known problems that remain in the beta.

Users can download the beta from the VMWare site. The software requires an Intel-based Mac with a Core 2 Duo or Xeon processor, 512MB of memory and Mac OS X 10.4.9 or later.