Files that have the SYS extension are basically the Windows System Files. Microsoft Corporation developed the SYS extension file. This file format was used by the Windows and MS-DOS operating system to store data that is related to the settings, device drivers, and other Windows system details that are saved on a computer.
Some of the most common .SYS files are the IO.sys and MSDOS.sys. The files that comprise of the SYS extension are hidden by the system’s OS already. Although the SYS files are Windows based files, they can also be used on the Mac computers that have Windows OS installed. On the other hand, the Mac computer that does not have the Windows OS installed cannot run a SYS format file.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .SYS file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .SYS file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .SYS file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.
There may be several reasons why you cannot open the file with .SYS extension. Directly on this website you can find a solution of the most common problem with the .SYS file – that you do not have on your computer the appropriate program to open the file.