Mac book air 升级 OS X High Sierra 时遇到问题

Mac book air i7定制版（2015年末）打算升级OS X High Sierra 时遇到问题，无法升级。

点击Get按钮后显示弹窗，提示银联在此电脑上不能使用，请更新到最新系统后再试。现在没有办法解决，有遇到相同问题的么？升级不了系统很多软件用不了比较头疼。屏幕截图 如下：

English version: I have a Mac book air (produced at the end of 2015, it is a i7 version). When I was trying to update to the newest OS X system which is Mac OS High Sierra, an error occurs, and it says"UnionPay is not supported on this OS version, please update to the newest Mac OS version and try again." It turns out to be quite confusing and I do not have any solution to solve the problem. Anyone is in the same situation? Here is the screenshot: