Apple has been working on ways to save power and increase convenience, allowing devices to respond to network requests and perform low-power tasks in sleep mode. If you have an idle MAC device on hand, you can use it as a home server. These MAC devices have a setting called wake up network access, which means you can stay in low-power or sleep mode until you need it. < / P > < p > but when you re connect to the MAC via a virtual network service, it lights up the screen. This will not only disturb colleagues or family members, bring potential privacy issues, but also a waste of energy. < / P > < p > in a recent Apple patent, Apple has demonstrated “controlling computer systems in standby mode”, which enables remote Macs or other devices to perform tasks without wasting energy. “Computer systems used today usually have a network interface that allows wired or wireless communication with other devices or systems,” wrote the patent. This communication may be in response to input received from a user who physically operates a computer system and to an input received remotely. The latter function allows remote playback of sound, positioning of computer systems, and so on. ” < / P > < p > the patent states that “exemplary tasks performed in standby mode include uploading one or more files to a remote computer system, downloading one or more files from the remote computer system, deleting one or more files from the computer system, accessing input / output devices, disabling the computer system, and performing memory checks on the computer system.”. < / P > < p > this means that the device running as a server is able to respond continuously rather than constantly start from sleep. This will make it easier to run the apple mail server and take advantage of the Mac’s better e-mail rules without having to keep it fully turned on all the time.