two different versions of the OS running on the same computer).
This operating system could be a different operating system (such as Windows OS running inside the Mac OS) or, in this case, an older version of the same operating system (e.g. I ran into an unexpected snag with the Macbook Air I bought to replace it, though: the most current OS X operating systems do not support older versions of Finale, but a number of orchestrators I work with still use Finale 2011 and Sibelius 6.įortunately, there is a solution to this dilemma in the form of virtual machines.Ī virtual machine (VM) is an emulation of a computer operating system.
I recently had to retire my trusty 2007 Macbook due to lack of Dropbox support for OS X Lion (10.7).
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