Tascam UH-7000 Owner's Manual page 11

When the Gatekeeper setting is "Allow applications
downloaded from: the Mac App Store"
"'TASCAM UH-7000 X.XX' can't be opened because it was
not downloaded from the Mac App Store. " might appear as a
security warning message.
In this case, click the OK button to close the message. Then,
control-click (or right-click) the file and click "Open".
When the "'TASCAM UH-7000 X.XX' can't be opened because
it was not downloaded from the Mac App Store. Are you sure
you want to open it?" security warning message appears,
click the "Open" button.
This message might also appear when the Gatekeeper
setting is something other than "Allow applications
downloaded from: the Mac App Store".
If the "'TASCAM UH-7000 X.XX' can't be opened because
it was not downloaded from the Mac App Store. " security
warning message appears again, you might not be able to
open the file.
In this case, copy the file from the folder where it is to the
desktop or another folder, and then open it. Alternatively,
change the Gatekeeper settings to "Allow applications
downloaded from: the Mac App Store and identified devel-
opers" and try opening it again.
When the Gatekeeper setting is not "Allow
applications downloaded from: the Mac App Store"
"'TASCAM UH-7000 X.XX' is an application downloaded
from the Internet. Are you sure you want to open it?" might
appear as a security warning message. In this case, click the
"Open" button.
3 – Installation
Changing the Gatekeeper setting
The Gatekeeper setting can be changed using the "Allow
applications downloaded from:" item on the "General" page
of the "Security & Privacy" pane of the System Preferences.
To change this, you must click the lock icon ( ) at the
bottom left and enter a password to unlock the settings.
This setting will lock again when you click the "Show All"
button at the top left of the window to close the open pane
or when you quit the System Preferences by, for example,
clicking the round button at the top left corner of the
window ( ) or typing command-Q.
CAUTION
Changing the Gatekeeper settings could result in security
risks.
If you changed the Gatekeeper setting to decrease security
(use one of the lower settings), set it back to the original
setting after updating the driver and/or firmware.
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TASCAM UH-7000