Upgrade genuine WIN10 and keep Yosemite dual-exercise

Because a colleague upgraded the genuine Win10, the heart grows grass, originally x230 Win7 is genuine, now WIN10 can be free upgrade, why not do?

For this, 2 trips to Lenovo's repair station, a lot of restrictions, and finally decided to take care of themselves. It is said that the need to restore to the original Win7 after upgrading Win10, can be, the process is complex and time-consuming, Win7 does not support GPT partition, to coexist with the Yosemite to use GPT; the first liter win10 must rise in Win7, not new installation, otherwise cannot be activated ; During the upgrade Win10 the card checks for updates and so on. The final summary is as follows:

1. To install dual-operation, first press the GPT partition (to have an EFI partition), mount the WIN10, install the Yosemite, then copy the clover to the EFI partition, and finally adjust the UEFI options with the UEFI software under Windows Let the Yosemite entry point to Clover64.efi in Clover.

2, WIN10 installation and genuine activation: The use of WIN10 installation tools, the production of ISO, write to the USB flash drive to install better (online download If the process is wrong, but also start again). In order to ensure that the WIN10 automatic activation, the first installation win10 need to be made from the Win7 with the USB flash drive installation, as prompted to operate, the installation skip serial number input link, installed after the network will be automatically activated (I understand that the win10 at this time automatically the Win7 serial number and device information sent to Microsoft to complete the activation, The new installation will automatically recognize that this computer is genuine, as the Win7 recovery system does not need to enter the serial number of a principle, is there OEM information in the BIOS?).

Upgrade genuine WIN10 and keep Yosemite dual-exercise