Dell Inspiron 3520 Gives Errors After installing macOS

My Dell Inspiron 3520 is giving me a error when I try to boot into macOS the screen says this:

Intel UNDI, PXE-2.1 (build 083) Copyright 1997-2000 Intel Corporation This Product is covered by one or more of the following patents: (not typing patents) Realtek PCIe FE Family Controller Series v1.27 (10/31/11) PXE-E61 Media test failure, check cable PXE-MOF: Exiting PXE ROM. boot0: GPT boot0:GPT boot0:error

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