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4.2 KiB
HTML
1 line
4.2 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<title> OS X notes for Mini vMac </title>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="canonical" href="osx_note.html">
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</head>
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<body>
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<div>
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<i> <a href="https://www.gryphel.com/index.html">www.gryphel.com</a>/c/<a href="index.html">minivmac</a>/osx_note
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- <a href="https://www.gryphel.com/c/feedback.html">feedback</a> </i>
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</div>
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<hr>
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<h2 align=center>
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OS X
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</h2>
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<h3 align=center>
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notes for Mini vMac
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</h3>
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<hr>
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<p>
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There are two issues in recent versions of OS X that cause
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problems for Mini vMac.
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</p>
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<blockquote>
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<p>
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Quick Fix : run “xattr -cr <Path to Mini vMac>” in
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the terminal.
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</p>
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<p>
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(step by step instructions <a href="osx_note.html#step">below</a>)
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</p>
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</blockquote>
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<p>
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Further explanation:
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</p>
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<p>
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One issue is caused by Path Randomization, added in macOS Sierra (10.12).
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If an application that Apple thinks is trustworthy is bundled
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together with malicious library code in the same folder, the
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malicious code may be run by the application. The silly way that Apple
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has chosen to prevent this is to in effect move the application
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somewhere else before running it, so it can’t find the library code.
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It can’t find anything else in the application’s folder either, which
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is a problem for Mini vMac, which looks for things in its folder,
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such as the ROM image file. One work around is to put the image
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in one of the other places that Mini vMac looks, as described
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in the
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<a href="hardware.html#rom">ROM section</a>
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of the Emulated Hardware Reference. Another option is to tell macOS
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not to do Path Randomization for Mini vMac, using the xattr command,
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as described in more detail below.
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</p>
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<p>
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The other issue is caused by Gatekeeper, added in OS X Mountain Lion
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(10.8). By default, the operating system will refuse to run applications
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downloaded from the internet, unless Apple considers it trustworthy
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(because it is digitally signed by a developer registered with Apple).
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Gatekeeper is in some ways a good idea, but some people consider it as
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one step along the way to making OS X like iOS, where no software
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can be installed without Apple's permission, and emulators are
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forbidden, including Mini vMac. So I decline to participate, and Mini
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vMac is not signed with an Apple Developer ID.
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One way to override Gatekeeper, giving an application permission to run,
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is to hold down the control key and click on its icon (or right click)
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to get a contextual menu, then choose the Open item, and in the warning
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dialog that comes up click on the Open button. (This only needs to
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be done the first time Mini vMac is run.) Another option is
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to use the xattr command.
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</p>
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<p>
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<a name="step"> Using xattr, step by step: </a>
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</p>
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<p>
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* From the Finder, choose the “Utilities” from the
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“Go” menu.
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</p>
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<p>
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* Find the “Terminal” application
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(in the “Utilities” folder just opened), and launch it.
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</p>
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<p>
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* Type “xattr -cr ” (not including the quotes, but
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including the trailing space), into the Terminal window that has
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just opened.
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</p>
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<p>
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* Drag the icon of the Mini vMac application into the terminal window.
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(This should paste in the path string). The result should look
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something like:
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</p>
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<blockquote>
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<pre>
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xattr -cr /Volumes/rd/Mini\ vMac.app
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</pre>
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</blockquote>
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<p>
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* Press the return key to execute the command. (This clears
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all extended attributes of all files in the application
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bundle.)
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</p>
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<p>
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* You should now be able to launch Mini vMac without interference
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from Gatekeeper and Path Randomization.
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</p>
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<p>
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<b>warning</b>: You should only do this for applications that
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you have reason to trust. Please only download Mini vMac
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from pages on “www.gryphel.com”. It would also
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be to good to check the md5 checksum and the signature.
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</p>
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<hr>
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<div>
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<i> <a href="https://www.gryphel.com/index.html">www.gryphel.com</a>/c/<a href="index.html">minivmac</a>/osx_note
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- <a href="https://www.gryphel.com/c/feedback.html">feedback</a> </i>
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<br>
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copyright (c) 2017 Paul C. Pratt - last update 7/23/2017
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</div>
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</body>
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</html>
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