HELP! Reboot and Select Proper Boot Device ERROR

[Habibikr]

Thank you in advance. 

I have just finished building my PC (specs below), and get into ASUS BIOS. The BIOS recognises all the hardware, and everything works seamlessly. The problem appears when I click boot from Sandisk USB (ExFat) to boot up Windows 10 (downloaded onto the USB from a macbook). Instead of starting up Windows 10 for the first time, the message "reboot and select proper boot device or insert boot media in selected boot device and press a key_" appears. I have searched online for upwards of 7 hours, asked friends, double checked the hardware (which seems in perfect condition), played around with the CSM (and now put it back to default), but nothing seems to be working. Could the problem be that I cannot open the windows 10 download on my macbook and accept their agreements?

Please, I would love any suggestions or advice from anyone. 

 

Specs (all new): Ryzen 5 3600, Asus ROG Strix B450-F Gaming, GTX 1650 super, G-Skill 16GB 3200Mhz, 1TB SSD, 2TB Hard Drive, BeQuiet PurePower 600w, Cooler master Hyper 212 Black Edition CPU Cooler, 4 fans. 

 

This is the error which appears. 

 

Thank you for your time!

[ChrisZH]

Are you booting to install windows?

[Habibikr]

6 minutes ago, ChrisZH said:

Are you booting to install windows?

Yes, for Windows 10 English 64-Bit.

[ChrisZH]

19 minutes ago, Habibikr said:

Yes, for Windows 10 English 64-Bit.

You download and make an iso image?

[Habibikr]

11 hours ago, ChrisZH said:

You download and make an iso image?

I can't make it an ISO image, I think its because im on mac. Do you think thats the problem?

[ChrisZH]

11 hours ago, Habibikr said:

I can't make it an ISO image, I think its because im on mac. Do you think thats the problem?

That's what my guess would be, to install windows from USB it needs iso image I think