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<title> OS X notes for Mini vMac </title>
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<h2 align=center>
OS X
</h2>
<h3 align=center>
notes for Mini vMac
</h3>
<hr>
<p>
There are two issues in recent versions of OS X that cause
problems for Mini vMac.
</p>
<blockquote>
<p>
Quick Fix : run “xattr -cr <Path to Mini vMac>” in
the terminal.
</p>
<p>
(step by step instructions <a href="osx_note.html#step">below</a>)
</p>
</blockquote>
<p>
Further explanation:
</p>
<p>
One issue is caused by Path Randomization, added in macOS Sierra (10.12).
If an application that Apple thinks is trustworthy is bundled
together with malicious library code in the same folder, the
malicious code may be run by the application. The silly way that Apple
has chosen to prevent this is to in effect move the application
somewhere else before running it, so it can’t find the library code.
It can’t find anything else in the application’s folder either, which
is a problem for Mini vMac, which looks for things in its folder,
such as the ROM image file. One work around is to put the image
in one of the other places that Mini vMac looks, as described
in the
<a href="hardware.html#rom">ROM section</a>
of the Emulated Hardware Reference. Another option is to tell macOS
not to do Path Randomization for Mini vMac, using the xattr command,
as described in more detail below.
</p>
<p>
The other issue is caused by Gatekeeper, added in OS X Mountain Lion
(10.8). By default, the operating system will refuse to run applications
downloaded from the internet, unless Apple considers it trustworthy
(because it is digitally signed by a developer registered with Apple).
Gatekeeper is in some ways a good idea, but some people consider it as
one step along the way to making OS X like iOS, where no software
can be installed without Apple's permission, and emulators are
forbidden, including Mini vMac. So I decline to participate, and Mini
vMac is not signed with an Apple Developer ID.
One way to override Gatekeeper, giving an application permission to run,
is to hold down the control key and click on its icon (or right click)
to get a contextual menu, then choose the Open item, and in the warning
dialog that comes up click on the Open button. (This only needs to
be done the first time Mini vMac is run.) Another option is
to use the xattr command.
</p>
<p>
<a name="step"> Using xattr, step by step: </a>
</p>
<p>
* From the Finder, choose the “Utilities” from the
“Go” menu.
</p>
<p>
* Find the “Terminal” application
(in the “Utilities” folder just opened), and launch it.
</p>
<p>
* Type “xattr -cr ” (not including the quotes, but
including the trailing space), into the Terminal window that has
just opened.
</p>
<p>
* Drag the icon of the Mini vMac application into the terminal window.
(This should paste in the path string). The result should look
something like:
</p>
<blockquote>
<pre>
xattr -cr /Volumes/rd/Mini\ vMac.app
</pre>
</blockquote>
<p>
* Press the return key to execute the command. (This clears
all extended attributes of all files in the application
bundle.)
</p>
<p>
* You should now be able to launch Mini vMac without interference
from Gatekeeper and Path Randomization.
</p>
<p>
<b>warning</b>: You should only do this for applications that
you have reason to trust. Please only download Mini vMac
from pages on “www.gryphel.com”. It would also
be to good to check the md5 checksum and the signature.
</p>
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