- Ensure new OS file is on disk.
- Press DISK.
- Select DISK UTILITIES.
- Select COPY SYSTEM.
- Select the OS file as source and Internal System as destination.
Source: E-Synth Ultra — e-mu-eos-4-0-manual (manual)
Symptoms this guide addresses
Source: E-Synth Ultra — e-mu-eos-4-0-manual (manual)