@Gog_CA1 - yes there are clooges to make OS's on a 32-bit CPU's address more RAM - BUT they are clooges and don't work effectively. The chip design fundamentally means they can't REALLY address more than 4G RAM - 32-bit CPUs have 32-bit registers, meaning 2 to the power of 32 addresses, or 4 gigabytes of RAM, can be referenced. This is why the ability to address more RAM has been the primary driver for 64-bit CPU's. UPDATE on Bryce under Rosetta - seem to have uncovered a problem with the trackball remembering which setting you have enabled... Again, more testing to do. I can see its going to be a fun weekend! Garry