Easy when a line is taken out of context. The entire paragraph from Run Faster, page 102, where that is taken from is talking about metasapients and shapeshifters who select a Priority other than E to Magic.
"Metasapients and shapeshifters who select Priority A, B, C, or D for Magic have their natural Magic of 1 replaced with their new Magic attribute. Character options that have a natural Magic attribute cannot also have a Resonance attribute and thus cannot select that option during character creation. Special attribute points can be used to increase the natural Magic attribute of a metasapient or shapeshifter, and the attribute can also be increased through Karma purchase as part of normal character advancement. If a character’s Magic is reduced to 0 through Essence loss, they cannot use any abilities tied to Magic per the rules on p. 278, SR5."
All in all, sure, I'd say that single line jim1701 pointed out will allow any metasapient or a shifter to raise their Magic by spending special attribute points and/or karma, sure. However, the chart on page 105 states that the maximum Magic for all of them is 1, and unless you take something like Exceptional Attribute or have a Priority other than E to Magic to increase that maximum then you're stuck. If metasapients and shapeshifters were meant to have a Magic higher than 1 without taking an Awakened quality of some kind, then why do the charts that actually list the ranges for all of their Attributes have only a "1" for MAG (accounting for the missing EDG in shifters that skews the title bar for Attributes).