I cannot see colored signs in Minecraft (Mac)

Many multiplayer servers use colored signs, on my 13 inch Mac Book Pro, Although I can see all the colors in chat, I am not able to view the colors on these signs.

What I expected to happen was...:
I thought that I would be able to see the colors, as my friend using a 15" Mac Book Pro can see the colors on the signs.

What actually happened was...:
I was not able to see the colors on the sings.

Steps to Reproduce:
1. Log on to a server with colored sings while using a 13" Mac Book Pro. (My example is Hypixel's Server)
2. Look at any sign that should normally display colors.
3. Boom, NO COLORS!!!!

Note: There is a mod known as "Minecraft Lighting Fix Mod", this does fix the sign issues and a lot of other graphics issues, but it is not yet updated and it would be much more convenient if this was built in to Minecraft.

Note: If the sign is a looked at from an odd angle the colors are displayed.