On newer Macs, Metal is the preferred technology for drawing the graph. On some older Macs, in particular if you’re using a patch for a macOS version that is not officially supported by your device, Metal could cause drawing issues, in which case using the older OpenGL technology is preferred.

Disable Metal

Open the Terminal (in /Applications/Utilities), copy and paste the following line:

defaults write org.desairem.Disk-Graph disableMetal true

and press Enter.

If you’re using Disk Graph Lite, use the following instead:

defaults write org.desairem.Disk-GraphLite disableMetal true

Enable Metal

To enable Metal again, use the following line:

defaults delete org.desairem.Disk-Graph disableMetal

If you’re using Disk Graph Lite, use the following instead:

defaults delete org.desairem.Disk-GraphLite disableMetal