Something has changed on OS X that prevents /usr/local/bin from being in the default search path.  It is when launched from a terminal window, but not when BOINC launches vboxwrapper.  I think recent versions of VirtualBox changed where it stores VboxManage on install.  bbad0d9d recently addressed this in the CC.

VBOX: Check for the cache disk configuration flag before attempting to query for the vm_image virtual disk.  There will be no vm_image virtual disk to unregister when cache disks are used with isocontextualization.

The scratch directory is created under the project folder.

VBOX: cut down on some of the noise with spurious 'Status Report' messages when we attempt to launch the VM.

VBOX: Only add the guest additions ISO to the VM if the file has actually been detected on the file system.

Some Linux systems separate the VirtualBox packages so that the guest additions ISO is in a separate package.  We were attempting to add a DVD device for a file that did not exist.

VBOX: If polling for the current VM state fails for any reason, like vboxsvc crashing, do a temp exit for 24 hours.

Before COM, polling for the current state wasn't as critical.  If the poll operation failed, we would try again in one second anyway.

After COM, it is used as a test to see if the communication channel between the wrapper and VirtualBox is still operational.  If not, temp exit and hope things work the next attempt.

Projects may want to handle check-pointing within their own application and skip the disk intensive requirements of a VM snapshot.

VBOX: Configure a bunch of virtual functions to be purely abstract to avoid a bunch of compiler warnings in gcc

VBOX: Make the service install scenario work again.

VBOX: When checking for the existence of a VM registered to a given slot directory, also check for the ISO Contextualization image and cache disk image.  If any type of media is registered to a given slot directory, close it regardless if it is attached to a VM or not.

VBOX: Introduce the notion of Virtualbox COM namespaces. We currently support VirtualBox 4.2 and VirtualBox 4.3.

VBOX: Begin refactoring for supporting the native VirtualBox API set on Windows.  Use the code in the deprecated directory as a baseline.

When the file is detected, the wrapper will call boinc_temporary_exit() and restart the VM at a later date.

VBOX: Attempt to fix a possible crash seen on T4T with an incompatible version of VirtualBox running on Linux.

VBOX: Try and prevent vboxwrapper from starting the VM if BOINC has signaled boinc_status.quit_requit or boinc_status.no_heartbeat.

TODO: Refactor how command line options and vbox_job.xml options are handled.  This was a ugly hack.

VBOX: Make the guest additions available to all VMs.  This does not mean the VM will use them, but they will be available.

VBOX: Do not disable the host I/O cache for virtualized disk controllers that do not support async I/O within VirtualBox.

VBOX: Use the 'Name' field instead of the internal virtualbox name for the default network interface.

VBOX: When the bridged network option is selected, don't forget to set which network interface it is supposed to bridge with.