---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 3/16/20 10:26 PM
Description: Updating screen events

java.lang.RuntimeException: Failed to check session lock, aborting
at bfb.i(SourceFile:64)
at bfb.<init>(SourceFile:50)
at bey.<init>(SourceFile:21)
at bez.a(SourceFile:84)
at bib.a(SourceFile:2159)
at bol.e(SourceFile:229)
at bol.a(SourceFile:182)
at bol.a(SourceFile:148)
at bjm.a(SourceFile:41)
at bok.a(SourceFile:117)
at blk.k(SourceFile:400)
at bok.k(SourceFile:49)
at blk.q(SourceFile:377)
at bib.t(SourceFile:1625)
at bib.az(SourceFile:1000)
at bib.a(SourceFile:419)
at net.minecraft.client.main.Main.main(SourceFile:123)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Thread: Client thread
Stacktrace:
at bfb.i(SourceFile:64)
at bfb.<init>(SourceFile:50)
at bey.<init>(SourceFile:21)
at bez.a(SourceFile:84)
at bib.a(SourceFile:2159)
at bol.e(SourceFile:229)
at bol.a(SourceFile:182)
at bol.a(SourceFile:148)
at bjm.a(SourceFile:41)
at bok.a(SourceFile:117)
at blk.k(SourceFile:400)
at bok.k(SourceFile:49)
at blk.q(SourceFile:377)

– Affected screen –
Details:
Screen name: bok
Stacktrace:
at bib.t(SourceFile:1625)
at bib.az(SourceFile:1000)
at bib.a(SourceFile:419)
at net.minecraft.client.main.Main.main(SourceFile:123)

– System Details –
Details:
Minecraft Version: 1.12.2
Operating System: Mac OS X (x86_64) version 10.13.6
Java Version: 1.8.0_74, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 170096384 bytes (162 MB) / 234881024 bytes (224 MB) up to 2147483648 bytes (2048 MB)
JVM Flags: 7 total; -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.12.2
LWJGL: 2.9.2
OpenGL: NVIDIA GeForce GT 640M OpenGL Engine GL version 2.1 NVIDIA-10.32.0 355.11.10.10.40.102, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: Yes
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: vanilla, programer_art
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-3330S CPU @ 2.70GHz