It appears this week is one for the rollout of Apple's public betas. The iOS 11 one has now been followed by macOS High Sierra, with willing testers capable of downloading and trialling the company's latest desktop and notebook operating system. 

High Sierra, like much of Apple's new software, was showcased at WWDC 17 a few weeks ago, bringing with it several 'under the hood' improvements, as opposed to a fully fledged overhaul the OS. 

Some of the new features include smoother graphics performance, support for certain types of VR applications and functionality with new image and video formats. One significant change, however, is the move to APFS (Apple Filing System). It replaces the HFS+ system that was in place previously, and brings the desktop version of Apple's software in line with its mobile version, with APFS already porting to the iPhone and iPad. 

Should you not be keen on the APFS change, testers can choose not to make the switch when installing the download of High Sierra. Whether or not that will be a possibility for the proper version of High Sierra, remains to be seen.