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I'm on the newest Macbook Pro using Mohjave, 10.14.1.

And I have Optifine installed with all video settings set to either off, or fast and stuff moving around is super laggy and jerky. It's not the internet connection cause Minecraft runs like butter on both my daughters Surface Pros. :/

OptiFine: 1.13.2

Resolution: 800 x 600

My FPS spikes up to the 290 range, but when I move, the lagging starts and FPS drops to 50ish then freezes for a split sec at 0-1 FPS :(.

I've run with both this JVM turned on and off:

-Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M

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I've also updated the Info.plist file to try force it to use 8 gigs of ram:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>CFBundleDevelopmentRegion</key>
    <string>en</string>
    <key>CFBundleExecutable</key>
    <string>launcher</string>
    <key>CFBundleIdentifier</key>
    <string>com.mojang.minecraftlauncher</string>
    <key>CFBundleInfoDictionaryVersion</key>
    <string>6.0</string>
    <key>CFBundleIconFile</key>
    <string>favicon</string>
    <key>CFBundleName</key>
    <string>Minecraft Launcher</string>
    <key>CFBundlePackageType</key>
    <string>APPL</string>
    <key>CFBundleShortVersionString</key>
    <string></string>
    <key>CFBundleSignature</key>
    <string>????</string>
    <key>CFBundleVersion</key>
    <string>1</string>
    <key>LSMinimumSystemVersion</key>
    <string>10.8.0</string>
    <key>NSHumanReadableCopyright</key>
    <string>Copyright © 2018 Mojang. All rights reserved.</string>
    <key>NSMainNibFile</key>
    <string>MainMenu</string>
    <key>NSHighResolutionCapable</key>
    <string>YES</string>
    <key>VMOptions</key>
    <string>-Xmx8G -Xms8G</string>
</dict>
</plist>
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  • Try Mipmap lower. Also, 1.13 is laggy, even on my pretty good PC. If you want better performance, the best you can currently do is playing 1.12.2 instead. Nov 12 '18 at 10:15
  • You indicate it runs like butter on the Surface Pro... which version of minecraft is on the Pro? The reason I ask is that the Windows Store (Bedrock) edition is written in C++ opposed to the Java... The C++ edition is far more performant language when used for this type programming. (Java can be fast on its on, but Java Minecraft isn't.). Out of interest, what FPS do you get? (F3 should show this)
    – Stese
    Nov 12 '18 at 10:19
  • Also, could you consider re-phrasing so you have a specific question in your post that can be answered?
    – Stese
    Nov 12 '18 at 10:20
  • @Stese My FPS is usually running high, hit as high as 290 FPS, but it drops to 50-1 FPS when the performance lag hits :( which happens basically every 1-2 secs. Also if I'm on 1.12 can I play with my kids who are on the latest version?
    – Leon Gaban
    Nov 12 '18 at 10:30
  • You might benefit from running the tools in the F3 Menu to gain an idea what is causing the lag. Assuming that you are all on the Java Version and that the lag only happens to you, it would indicate that the issue is the machine and not the game specifically. I'm not sure what options you have on Mac, but could you monitor what the machine is doing while running Minecraft, and crossreference that with the performance... periodic issues like this would tend to be a process with high CPU or HDD/SSD usage.
    – Stese
    Nov 12 '18 at 10:37
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As of right now, the 1.13.2 Optifine is pretty unstable. It was released 22 days ago, and there are no other downloads, making the one you have the only one. There are no new updates or more stable builds, so perhaps the problem is that the build you have equipped has a few bugs or issues.

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  • But I've tried the regular Minecraft build too, also 1.13.2 :( and still laggy.
    – Leon Gaban
    Nov 21 '18 at 13:21

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