[MD1] Disabling the CFM-68K Runtime
TweetFollow Us on Twitter

[MD1] Disabling the CFM-68K Runtime

Apple recommends customers disable the CFM-68K Runtime Enabler extension

Apple Computer has discovered a bug in the CFM-68K Runtime Enabler
extension that can affect the stability of Macintosh computers based on the
680x0 processor. This extension allows the use of certain applications on
680x0 computers, and is installed by an application installer only if the
application requires the extension. Customers will know they have this
extension installed if the file " CFM-68K Runtime Enabler" (note that the
file name begins with a space) is located in their Extensions folder which
resides inside their System folder.

In certain circumstances, the bug can cause applications which rely on the
CFM-68K Runtime Enabler to not function properly, resulting in application
instability and potential loss of data. The most obvious symptoms are what
appear to be random system crashes and hangs. Macintosh and Mac
OS-compatible computers based on the PowerPC processor are not affected by
this bug.

Because of the potential quality impact of this bug, Apple is recommending
that customers with computers based on the 680x0 processor disable the
CFM-68K Runtime Enabler extension and not use programs which rely on this
extension. See below for instructions on how to disable this extension.
Apple is currently working to resolve this bug.

What is the CFM-68K Runtime Enabler?

The CFM-68K Runtime Enabler is an extension which makes it easier for
developers of applications to design their programs to run on both 680x0
and PowerPC computers without having to write separate programs for both
processor families.

On a more technical level, the Code Fragment Manager ("CFM") was originally
introduced by Apple only for Macintosh and Mac OS-compatible computers
based on the PowerPC processor. It allows applications to share their
programming code through special files known as shared libraries. In
addition to being able to share programming code, applications which are
programmed to use shared libraries can reduce their memory requirements. In
response to the success of the PowerPC version of CFM, Apple introduced a
version of CFM for Macintosh computers based on the 680x0 processor. This
version of CFM for 680x0-based Macintosh computers is the CFM-68K Runtime
Enabler extension.

What applications are affected by this bug?

Only applications which have been explicitly programmed to use the CFM-68K
Runtime Enabler can be affected by this bug. Apple Computer products which
rely on CFM-68K Runtime Enabler are: OpenDoc, Cyberdog, LaserWriter
(versions 8.4 and 8.4.1 only), and the Apple Media Tool. Only the 68k
versions of these software packages are affected. This bug does not affect
PowerPC versions of these products. There are currently few applications
which rely on the CFM-68K Runtime Enabler and therefore Apple does not
believe that this problem is very widespread.

You can identify applications which rely on the CFM-68K Runtime Enabler
extension once the extension is disabled (see below for instructions on
disabling the extension). When the CFM-68K Runtime Enabler is disabled,
applications which rely on it will report the following error when you
attempt to launch them:

*

Is this bug caused by these applications?

Not directly. The bug is caused by the use of CFM-68K Runtime Enabler in
ways it was not designed to handle. Unfortunately, its limitations were not
recognized by the applications.

What should I do if I have installed one of these affected products?

If you have installed OpenDoc or Cyberdog, you should not use these
products until Apple releases a solution for this problem. If you have
installed LaserWriter version 8.4 or 8.4.1, you should install LaserWriter
version 8.3.4, which does not rely on the CFM-68K Runtime Enabler. If you
do not have LaserWriter 8.3.4, you can download it from the Apple support
site on the World Wide Web, which is located at:

http://www.info.apple.com/

If you are a member of the Apple Media Tool developer community, please
visit the AMT web site at http://amt.apple.com/ for more information.

If you have a PowerPC-based Macintosh or Mac OS-compatible computer, your
computer is not affected by this problem. Therefore, you can continue to
use these products.

Should I contact third-party application developers about this problem?

No. Since a fix for this problem will be accomplished by modifying Apple's
CFM-68K Runtime Enabler, third-party application developers will be unable
to assist you with this problem.

How do I disable this extension?

There are two ways to disable this extension. One is to drag the extension
out of the Extensions folder which resides in your System Folder. The other
is to use the Extensions Manager control panel.

To disable the CFM-68K Runtime Enabler extension using the Extensions
Manager control panel, perform the following steps:

1. Open the Apple menu item and select Control Panels.

2. Locate Extensions Manager and double click it to open it.

3. Locate " CFM-68K Runtime Enabler". Note that there is a space at the
beginning of the name. You should find this extension near the top of the
Extensions Manager window under the Extensions heading, similar to this:

*

4. If there is a check mark ("") next to CFM-68K Runtime Enabler, click on
it so that there is no check mark.

5. Close the Extensions Manager window.

6. Restart your computer.

Is this bug caused by recent changes in the CFM68k Runtime Enabler?

No. This bug exists in all currently shipping versions of CFM-68K Runtime
Enabler, but was found during recent testing.

Why has it taken Apple this long to identify this bug?

Only recently have applications begun to make use of the CFM-68K Runtime
Enabler extension. The conditions which cause this bug have only been
exposed by recent increased use of the extension by applications.

I have a PowerPC computer. Does this affect me?

No. The bug is only in the CFM-68K Runtime Enabler extension, which runs
only on Macintosh computers based on the 680x0 processor. The Mac OS on
PowerPC computers does have code fragment capabilities, but it is
accomplished through different programming techniques not affected by this
bug.

What is Apple doing to fix this bug?

Apple has assigned a team of engineers to develop a solution for the bug.
At this time, there is not enough information to make any statements about
delivery of a solution.

How can I get the technical details about this bug?

Apple has a Technote about this bug available on the World Wide Web at:

http://devworld.apple.com/dev/technotes/tn/tn1084.html

 
AAPL
$105.22
Apple Inc.
+0.39
MSFT
$46.13
Microsoft Corpora
+1.11
GOOG
$539.78
Google Inc.
-4.20

MacTech Search:
Community Search:

Software Updates via MacUpdate

OS X Server 4.0 - For OS X 10.10 Yosemit...
Designed for OS X and iOS devices, OS X Server makes it easy to share files, schedule meetings, synchronize contacts, develop software, host your own website, publish wikis, configure Mac, iPhone,... Read more
TotalFinder 1.6.12 - Adds tabs, hotkeys,...
TotalFinder is a universally acclaimed navigational companion for your Mac. Enhance your Mac's Finder with features so smart and convenient, you won't believe you ever lived without them. Tab-based... Read more
BusyCal 2.6.3 - Powerful calendar app wi...
BusyCal is an award-winning desktop calendar that combines personal productivity features for individuals with powerful calendar sharing capabilities for families and workgroups. BusyCal's unique... Read more
calibre 2.7 - Complete e-library managem...
Calibre is a complete e-book library manager. Organize your collection, convert your books to multiple formats, and sync with all of your devices. Let Calibre be your multi-tasking digital... Read more
Skitch 2.7.3 - Take screenshots, annotat...
With Skitch, taking, annotating, and sharing screenshots or images is as fun as it is simple.Communicate and collaborate with images using Skitch and its intuitive, engaging drawing and annotating... Read more
Delicious Library 3.3.2 - Import, browse...
Delicious Library allows you to import, browse, and share all your books, movies, music, and video games with Delicious Library. Run your very own library from your home or office using our... Read more
Art Text 2.4.8 - Create high quality hea...
Art Text is an OS X application for creating high quality textual graphics, headings, logos, icons, Web site elements, and buttons. Thanks to multi-layer support, creating complex graphics is no... Read more
Live Interior 3D Pro 2.9.6 - Powerful an...
Live Interior 3D Pro is a powerful yet very intuitive interior designing application. View Video Tutorials It has every feature of Live Interior 3D Standard, plus some exclusive ones: Create multi... Read more
The Hit List 1.1.7 - Advanced reminder a...
The Hit List manages the daily chaos of your modern life. It's easy to learn - it's as easy as making lists. And it's powerful enough to let you plan, then forget, then act when the time is right.... Read more
jAlbum Pro 12.2.4 - Organize your digita...
jAlbum Pro has all the features you love in jAlbum, but comes with a commercial license. With jAlbum, you can create gorgeous custom photo galleries for the Web without writing a line of code!... Read more

Latest Forum Discussions

See All

Rami Ismail Opens Up distribute​() for D...
Rami Ismail Opens Up distribute​() for Developers Posted by Jessica Fisher on October 24th, 2014 [ permalink ] Rami Ismail, Chief Executive of Business and Development at indie game studio | Read more »
Great Hitman GO Goes on Sale and Gets Ne...
Great Hitman GO Goes on Sale and Gets New Update – Say That Three Times Fast Posted by Jessica Fisher on October 24th, 2014 [ permalink ] | Read more »
Rival Stars Basketball Review
Rival Stars Basketball Review By Jennifer Allen on October 24th, 2014 Our Rating: :: RESTRICTIVE BUT FUNUniversal App - Designed for iPhone and iPad Rival Stars Basketball is a fun mixture of basketball and card collecting but its... | Read more »
Rubicon Development Makes Over a Dozen o...
Rubicon Development Makes Over a Dozen of Their Games Free For This Weekend Only Posted by Jessica Fisher on October 24th, 2014 [ permalink ] | Read more »
I Am Dolphin Review
I Am Dolphin Review By Jennifer Allen on October 24th, 2014 Our Rating: :: NEARLY FIN-TASTICUniversal App - Designed for iPhone and iPad Swim around and eat nearly everything that moves in I Am Dolphin, a fun Ecco-ish kind of game... | Read more »
nPlayer looks to be the ultimate choice...
Developed by Newin Inc, nPlayer may seem like your standard video player – but is aiming to be the best in its field by providing high quality video play performance and support for a huge number of video formats and codecs. User reviews include... | Read more »
Fighting Fantasy: Caverns of the Snow Wi...
Fighting Fantasy: Caverns of the Snow Witch Review By Jennifer Allen on October 24th, 2014 Our Rating: :: CLASSY STORYTELLINGUniversal App - Designed for iPhone and iPad Fighting Fantasy: Caverns of the Snow Witch is a sterling... | Read more »
A Few Days Left (Games)
A Few Days Left 1.01 Device: iOS Universal Category: Games Price: $3.99, Version: 1.01 (iTunes) Description: Screenshots are in compliance to App Store's 4+ age rating! Please see App Preview for real game play! **Important: Make... | Read more »
Toca Boo (Education)
Toca Boo 1.0.2 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0.2 (iTunes) Description: BOO! Did I scare you!? My name is Bonnie and my family loves to spook! Do you want to scare them back? Follow me and I'll... | Read more »
Intuon (Games)
Intuon 1.1 Device: iOS Universal Category: Games Price: $.99, Version: 1.1 (iTunes) Description: Join the battle with your intuition in a new hardcore game Intuon! How well do you trust your intuition? Can you find a needle in a... | Read more »

Price Scanner via MacPrices.net

Weekend sale: 13-inch 128GB MacBook Air for $...
Best Buy has the 2014 13-inch 1.4GHz 128GB MacBook Air on sale for $849.99, or $150 off MSRP, on their online store. Choose free home shipping or free local store pickup (if available). Price valid... Read more
Nimbus Note Cross=Platform Notes Utility
Nimbus Note will make sure you never forget or lose your valuable data again. Create and edit notes, save web pages, screenshots and any other type of data – and share it all with your friends and... Read more
NewerTech’s Snuglet Makes MagSafe 2 Power Con...
NewerTech has introduced the Snuglet, a precision-manufactured ring designed to sit inside your MagSafe 2 connector port, providing a more snug fit to prevent your power cable from unintentional... Read more
Apple Planning To Sacrifice Gross Margins To...
Digitimes Research’s Jim Hsiao says its analysts believe Apple is planning to sacrifice its gross margins to save its tablet business, which has recently fallen into decline. They project that Apple’... Read more
Who’s On Now? – First Instant-Connect Search...
It’s nighttime and your car has broken down on the side of the highway. You need a tow truck right away, so you open an app on your iPhone, search for the closest tow truck and send an instant... Read more
13-inch 2.5GHz MacBook Pro on sale for $949,...
Best Buy has the 13″ 2.5GHz MacBook Pro available for $949.99 on their online store. Choose free shipping or free instant local store pickup (if available). Their price is $150 off MSRP. Price is... Read more
Save up to $125 on Retina MacBook Pros
B&H Photo has the new 2014 13″ and 15″ Retina MacBook Pros on sale for up to $125 off MSRP. Shipping is free, and B&H charges NY sales tax only. They’ll also include free copies of Parallels... Read more
Apple refurbished Time Capsules available sta...
The Apple Store has certified refurbished Time Capsules available for up to $60 off MSRP. Apple’s one-year warranty is included with each Time Capsule, and shipping is free: - 2TB Time Capsule: $255... Read more
Textilus New Word, Notes and PDF Processor fo...
Textilus is new word-crunching, notes, and PDF processor designed exclusively for the iPad. I haven’t had time to thoroughly check it out yet, but it looks great and early reviews are positive.... Read more
WD My Passport Pro Bus-Powered Thunderbolt RA...
WD’s My Passport Pro RAID solution is powered by an integrated Thunderbolt cable for true portability and speeds as high as 233 MB/s. HighlightsOverviewSpecifications Transfer, Back Up And Edit In... Read more

Jobs Board

*Apple* Solutions Consultant - Apple Inc. (U...
…important role that the ASC serves is that of providing an excellent Apple Customer Experience. Responsibilities include: * Promoting Apple products and solutions Read more
Senior Event Manager, *Apple* Retail Market...
…This senior level position is responsible for leading and imagining the Apple Retail Team's global event strategy. Delivering an overarching brand story; in-store, Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
Project Manager / Business Analyst, WW *Appl...
…a senior project manager / business analyst to work within our Worldwide Apple Fulfillment Operations and the Business Process Re-engineering team. This role will work Read more
*Apple* Retail - Multiple Positions (US) - A...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.