I've allways been using texture packs and have Optifine installed.

Now I wanna instal mods and use both Forge and Optifine.

 

But everywhere I look people just say ''Instal Forge BEFORE you install Optifne''.

But I have Optifine installed already and there is no uninstall option. So is there a way to still use both?

You can just put the Optifine.jar file into the mods folder just as you would do with mods

But only upto 1.14.4, since 1.15.2 is not Forge compatible?

Spoiler

OptiFine 1.15.2_HD_U_G1_pre7
 - not working: shaders, antialiasing, anisotropic filtering and render regions
 - fixed connected glass panes
 - fixed CTM overlays
 - fixed Smart Animations for GUI overlay
 - fixed custom lightmap affecting the GUI
 - fixed disabled fog to affect all entities and block entities
 - fixed option sliders registering outside clicks
 - fixed CEM for baby horse and llama
 - fixed chunks not loading due to configured shaders
 - fixed Random Entities depending on view distance
 - fixed Custom Sky
 - fixed fog in the Nether 
 - fixed Smart Animations for entities on fire 
 - fixed option Graphics depending on Dropped Items
 - fixed Natural Textures and Better Snow
 - fixed visual artifacts when manually placing blocks
 - fixed buttons in Chat Settings screen
 - fixed render distance above 32
 - fixed lighting of magma blocks
 - fixed handheld item flicker with dynamic lights
 - fixed dynamic lights for block entities and particles
 - updated to 1.15.2
 - not compatible with Forge
(21.02.2020)

 

Specific Optifine version work with specific Forge version, decided and chosen by Optifine. Most Minecraft versions, there's not even a compatible version.

Edited February 24, 20205 yr by larsgerrits