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I am planning of installing windows following the tutorial given by 9to5mac in the link https://9to5mac.com/2020/07/14/install-windows-mac-external-ssd-drive-boot-camp-2020-video/

I want to do this using Samsung T7 SSD on my MacBook Pro(2020, 16GB RAM, 512GB SSD)

I have a few questions about this if someone could answer:

  1. How much of the RAM will the windows use when run using the SSD? all 16 gb?
  2. If I do not have the SSD plugged in, will I be able to login to my MacOS smoothly?
Aytida
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  • If you succeed using the linked instructions to install Windows 10, could you post a comment? I ask because I have Windows 10 installed on an external Samsung X5 connected to a 2018 Mac mini and I could not get the instructions in your link to work. – David Anderson May 26 '21 at 04:22
  • @DavidAnderson Sure, waiting for my USB mouse to deliver in a few hours. Also, One of my friends installed watching the youtube tutorial for same and he succeeded – Aytida May 26 '21 at 04:49
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    Hey, I managed to get it, but the drivers did not install. So I guess I will have to do it all over again – Aytida May 26 '21 at 16:36

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I think you have a misconeception of how BootCamp and virtualization works.

BootCamp: Only on Intel Macs!

With BootCamp you can install Windows on your Mac. The guide you mentioned shows how to install it onto an external drive, since usually Apple only suggests partitioning your internal drive and installing Windows there.

After installing Windows on that drive or internally you have to shutdown your mac and press cmd + opt while starting up to access the boot menu and select the external drive, i.e. Windows. You will then only run Windows and can't switch back to macOS unless you shutdown Windows and restart into macOS.

With BootCamp you are running Windows natively on the Mac, i.e. your Mac basically works the exact same way as an equally spec'd "original" Windows Laptop. I.e. all hardware (including 16GB RAM) will be used. This is also the reason why you cant run Windows natively on an M1(ARM) Mac because it is written for x86 and not ARM.

Virtualization

There are multiple programs like Parrallels VMWare,... that allow installing a so called virtual machine. This virtualization allows you to run windows inside macOS, i.e. you basically have access to macOS and Windows at the same time. Windows will run in a seperate window, but if you make that fullscreen it looks like you are only running Windows.

However, since you are running Windows virtualized on top of macOS you have to assing a certain amount of RAM, CPU Cores,... to the virtual machine. This creates performance losses. In this case you would actually not be able to use all 16GB of RAM on Windows (but thats not what they explain in the linked article).

To briefly answer your questions:

If I do not have the SSD plugged in, will I be able to login to my MacOS smoothly?

Yes. You will simply boot into Mac and since there is no other startup device you dont have to choose macOS in the boot menu. Simply hit the startup button.

How much of the RAM will the windows use when run using the SSD? all 16 gb?

If you go the BootCamp route Windows will use all 16GB of RAM.

X_841
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