I have a mid 2011 Mac Mini with 16 GB Ram and both SSD and HD. I want to install Microsoft Visual Studio 2019 Community Edition. This can only be installed on systems running High Sierra. My Mac Mini is running Sierra. When I type High Sierra in spotlight the "Install High Sierra" icon is displayed in the taskbar. However, when I try to install it I get the message that this installation file is corrupted. I cannot download a new installation file from App Store because this file is already present in my computer. Kindly provide me a solution to install High Sierra.