Both Uses

render
in
Go Set a Watchman
(Edited)

Her companions were the lazier of the Old Sarum boys, the laziest of whom was one Albert Coningham, a slow thinker to whom Jean Louise had rendered invaluable service during six-weeks' tests.
p. 127.8 *

rendered = given
Maycomb and Maycomb County had taught him things she had never known, could never learn, and Maycomb had rendered her useless to him as anything other than his oldest friend.
p. 276.6 *

rendered = made (caused to become)

Definitions:

(1) (render as in: rendered service or a verdict)
to give or supply something
(2) (render as in: rendered her unconscious)
to make or cause to become
(3) (render as in: rendered interpretation)
to portray or create something in a particular way; or to interpret, translate, or extract from
The exact meaning of this sense of render depends upon its context. For example:
- "Each artist will render a different interpretation when painting a portrait." -- create in a particular way
- "A Supreme Court judge may render his own interpretation of the Constitution." -- interpret in a particular way
- "The computer you are using, rendered this page from software instructions." -- created through interpretation
- "A graph is rendered from the underlying data." -- made
- "Fat can be rendered (extracted) by cooking meat slowly." -- extracted from
(4) (meaning too rare to warrant focus)
A comprehensive dictionary will have more specialized definitions of render.