Installing OS onto new SSD
Hello, I recently got a SSD to replace my unibody mid 2009 macbook pro 15” hard drive. The original hard drive itself had been running on El Capitan before I erased it a while back. I have tried reinstalling the OS X on the original drive, but an error keeps occuring.
I have tried restarting holding Shift - Command -Option - R , and thought that would prompt the original Snow Leopard to reinstall, but only El Capitan shows up (probably because it was the last OS that was use) but again the error occurs and I cannot do anything.
I do not have any Time Machine backup.
I have also tried creating a bootable usb of High Sierra on a different Mac that works. I connected the SSD to the macbook pro and plugged in the bootable usb in - but upon restarting, the icon for High Sierra doesn’t look like the actual install icon, but a usb icon. When I click it, only a circle with a slash through it shows up on the screen, then the computer shuts off. I’m clearly doing things wrong but cannot figure out what. Any help would be appreciated!
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