Metal-capable graphics card or Intel HD Graphics 3000 or later.
Resolves crashes or lag when switching between tabs within the Timeline Index. Minimum System Requirements
Increases stability when sending projects to Apple’s Compressor app using the Shift-Command-E keyboard shortcut.
To run version 10.4.5 efficiently, your Mac should meet or exceed these specifications: macOS High Sierra 10.13.2 or later.
The 10.4.5 update focuses primarily on reliability and performance efficiency:
Approximately 3.8GB of available disk space for the application. How to Install and Update
Improves performance when generating audio waveforms for clips that do not contain audio channels.