I bought a brand new mac and installed minecraft. I down the recommended forge for 1.7.10. I put optifine inside of it, ran it, and all the text is either blank, white boxes, or greenish boxes.
https://gyazo.com/ce39c024c7fdcdb064a9977cce2a376d
https://gyazo.com/1fade8f15522c22e4946848e28263ca8
https://gyazo.com/5a0d5438198e4f22d8fb65c25e5157a1