How to switch Mac to the default system under Win10 dual system?

After the Win10 system was released, many PC users upgraded the Win10 system. Users including many Apple computers also installed dual systems for Win10 and Mac. However, after installing Win10 dual system on Mac, the default system will be switched to Win10. So how do I switch my Mac to the default system?

follows:

press the power button to boot, startup sound think, gray screen when the screen appears press the Option key immediately, then let go until after system boot selection screen appears. Then the system selection interface will appear, press the left and right arrow keys to select the system we need to start, after selecting, directly click the left mouse button, or press the Enter key to confirm.

Apple official and various websites are basically using "ld" when you boot up, hold down the Option key & rdquo; a sentence, there are very few specific instructions on when to press this button is most appropriate. In fact, users who have used Apple for a while have some experience. Sometimes we have not pressed the Option button, it has entered the system by default; or sometimes we have pressed for a long time, but found that the screen has been in a gray state. These two situations are basically because we press the Option button to press the night. When this happens, generally we can only restart or the power button is turned off and then started. There are some new users who have contact with Mac. There is no concept for how long this Option button is pressed. I think it can be clicked. It is not possible to loosen it by tapping it when booting.

The above is the introduction of how to switch Mac to the default system under Win10 dual system. After switching Mac to the default system, if you want to enter Win10 system, you need to switch in the boot area.