Jerking Giana Sisters on Mac / Vice(X64)

[myid]

Hi!

System: OSX Lion 10.7.4, 2,4GHz Core2Duo, 4GB Ram
Vice: X64 V2.3
Game: Great Giana Sisters, The ; g/GIANA1_03275_01.zip

When I play this Game I have approximately every 4 seconds a break (jerking). It hangs for 1/10 second and after this it plays correct. This happen every 4 second.

Does anyone else have this jerking? What can I do against this?

[.mad.]

I Don't have a Mac, but try this.

check and reset the default emulator OPTIONS.

Refresh rate (Auto)
Maximum speed (100%)
Video cache (ON)

if that fails,
try to disable any other system programs that are running in the background that could be conflicting with the emulator.