Re: I have to alter text in a supplied pdf. It open fine in Acrobat, I highlight the text, but when I change it it defaults fro another font as it's in the pdf and not on my mac. How can I fix this?

Changing body text is not simple. It's a desperate last resort. You need to buy the exact font. Acrobat will not let you edit in a font you don't own. Even then, it's undertain. Consider preparing an overlay in InDesign.