This is still the same as it's been for a long time. Choose the icon you want to copy, click once and either "Show Info" or Apple - i and in the info window click once on the icon in the upper left, then choose Edit>Copy. Choose icon you want to change, do the same info window, click once on the icon, then choose Edit>Paste. Done.
Ive been wondering if there if is a solution or am I trapped in a void of conformity? - Anthony Huff

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