Nook Simple Touch Driver Para Mac OSX

Upon guest startup, All USB devices are displayed in the Devices USB menu. Devices which have an enabled filter show status as Captured and are removed from the host as expected. They are not, however attached to the guest, and no checkmark is displayed next to them.
Tried several devices, including a SanDisk Ultra Fit flash drive and a Nook Simple Touch Glowlight, using both USB2 and USB3 ports. When the VM is not running, both devices are recognized by the host in either port.

Kindle Fire transforms into a Mac Plus and Newton MessagePad. Emulador de mac en nintendo ds. Based on a story I posted the other day about running an old version of the Mac OS on a Nook Simple Touch. And tons of drivers. As promised, I've created a packing list of all the things I'm bringing to The Gambia. The Peace Corps provided us with a VERY LONG and EXTENSIVE list, which isn't good because it's my nature to tend to overpack. Although I've listed out everything that I originally had intended to pack, I've already started removing. Sony dru-800a drivers for mac free.

Tried with both Linux and Windows 10 Guest VMs (running only one at a time), same results.
Clicking on a captured device produces a message such as:

I have been through numerous forum posts on this topic, including (sorry, can't post U-R-Ls yet):
I have:

• Disabled Windows Driver Signature Enforcement
• Uninstalled/reinstalled VirtualBox as administrator
• Manually reinstalled the VirtualBox USB drivers
• Verified that there is no UpperFilters key in the registry

Yesterday, in desperation, I reinstalled the USB driver for my motherboard, rebooted, started the VM, and suddenly everything was working fine! I could repeatedly plug in various USB devices and those with filters would attach to the guest automatically and those without filters I could click on and attach to the guest manually. After rebooting the host again though, I'm back to the original problem. I tried re-installing the motherboard USB driver again, and rebooting several times, but to no avail. I can't think of anything else I've changed since things started working.
I don't know if this is meaningful, but if I run msinfo with the guest running and look at the System Drivers, it shows:

• vboxusbmon: System, running
• vboxusb: Manual, stopped

System specs:

• VirtualBox Version 5.2.0 r118431 (Qt5.6.2), Extension Pack installed
• Host: Windows 8.1 Pro with Media Center, 6.3.9600 Build 9600, 64-bit, 32GB RAM
• Guest: Ubuntu Linux 16.04.2 LTS, 64-bit, 8GB RAM, Guest Additions installed
• Motherboard: Asus Z87-Plus

lsusb output (guest):

• Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
• Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
• Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

VirtualBox logs and log from following host commands are attached:

• VBoxManage -version
• VBoxManage list extpacks
• VBoxManage list usbhost
• VBoxManage list usbfilters
• VBoxManage showvminfo 'Ubuntu 16.04.2 FlowBlade'

I'll be grateful for any suggestions on how to proceed.