windows 64bit install to external SSD/USB3 for MAC

-------win10 installation usb disk / EFI boot ----------

diskpart

diskpart > list disk

diskpart > list disk　?

clean

convert gpt

create partition efi size=300

format fs=fat32 quick label="EFI"

assign letter=S

create partition primary

format fs=ntfs quick label="Windows"

assign letter=I

exit

diskpart 

>list volume

index:? check version number …

> dism /get-wiminfo /wimfile:(drive letter USB):¥sources¥Install.wim

 then copy usb to EFI

> dism /apply-image /imagefile:(drive letter USB):¥sources¥install.wim /index:1 /applydir:I:¥

> bcdboot I:\Windows /l ja-jp /s S: /f UEFI

------- win7 installation usb disk and keyboard/mouse started working ----------

Terminal prompt: diskutil list
- search for the identifier of the Windows 7 install USB stick, e.g. disk2s1
- Terminal prompt: sudo /usr/sbin/bless --device /dev/disk2s1 --setBoot --nextonly --legacy
- restart
- machine boots into Windows 7 installation with needed drivers

--- usb stick data to SSD/USB
disk part
list disk
select disk #
clean
create partition primary size=350
format fs=fat32 quick
active
assign letter=b
create partition primary
format fs=ntfs quick
active
assign letter=o
exit

dism /apply-image　コマンドwin7なし
（imageX　もしくは　Windows 7 用の Windows® 自動インストール キット (AIK)
[URL] http://www.microsoft.com/ja-jp/download/details.aspx?id=5753

の導入が必要）
win7 EFIブート mac機器上のEFIと整合性なし
　（それほどにwindows7は設計が過去のもの）
現状ー＞価値無しと判断し中断中
win7を使用するなら仮想環境までが　妥当