MacOS Big Sur release: New update available to download as some early users hit by app opening problems

Apple has finally released Big Sur, its latest major revision of the Mac operating system.It comes alongside Apple’s new MacBooks and Mac Mini, which include the M1 chip, the first that Apple has designed in-house and which promises vastly improved performance.Big Sur brings a total redesign to the look of the operating system, bringing it more in line with the design of the iPhone and iPad.