System Information
Operating system: Darwin-19.6.0-x86_64-i386-64bit 64 Bits
Graphics card: Intel(R) Iris(TM) Plus Graphics OpenGL Engine Intel Inc. 4.1 INTEL-14.7.8
MacBook Pro 13" 2020 (and also I get the same error message on MacBook Air 2015)
Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-13 23:10, hash: rB0f61b27e93f1
Broken: version: 2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: rB0330d1af29c0
Worked: version: 2.83.6
(used a new/default startup file)
Short description of error
Start blender via command line to display software version. Error started with with 2.90.0, but also happens with 2.91.0. Error not present in 2.83.x.
Error: Not freed memory blocks: 368, total unfreed memory 0.136139 MB
Exact steps for others to reproduce the error
For Blender 2.90.0 & 2.91.0, start blender from Mac terminal with background and show version args.
% /Applications/Blender\ 2.91.0\ mem\ leak.app/Contents/MacOS/Blender -b -v
...
Error: Not freed memory blocks: 368, total unfreed memory 0.136139 MB