Study finds mid-2013 MacBook Air’s 802.11ac Wi-Fi speeds throttled by bug in OS X

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Date: Tuesday, June 25th, 2013, 07:51
Category: MacBook Air, News, Software, wireless

Even in the event that the Wi-Fi connectivity issues on the mid-2013 MacBook Air notebooks are hardware-based, the underlying operating system software is apparently throttling potential data speeds on the new networking protocol.

Per AnandTech and CNET, a series of tests by AnandTech confirms that much of the Wi-Fi speed throttling is software-based. The new MacBook Air was announced by Apple at the recent Worldwide Developers Conference, and in addition to extended battery life, the new systems include support for 802.11ac Wi-Fi networking, which supports up to three times faster data rates in comparison with 802.11n.

In testing, AnandTech noticed that the link speeds of the systems are very high, at an average of about 533Mbps, but when transferring files over standard networking protocols, the speed drops to about 169Mbps at its maximum. This is over three times less than the expected speeds.

In investigating the issue, AnandTech discovered that an apparent bug in OS X limits the TCP window size (the maximum data that can be sent at a time) to a maximum of 64KB, which is far less than the 256KB needed to meet the speed capabilities of the 802.11ac connection.

As a result of this finding, AnandTech shows that in its current state, while the 2013 MacBook Air will still give fast file transfers, these will be limited to about 21MBps, instead of the more than 50MBps expected. Luckily, this limitation being in software means the fix should be easy, and it may be only a matter of a quick update for these systems to realize their full potential.

Stay tuned for additional details as they become available.

Apple looking into mid-2013 MacBook Air Wi-Fi issues, “capturing” units for study

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Date: Tuesday, June 25th, 2013, 07:41
Category: MacBook Air, News, Software, wireless

This might be why your friends, the ones who wait a month or two after a brand new product hits the market, could be right…

Per 9to5Mac, over the past few days, a notable amount of users have complained about Wi-Fi issues plaguing the new 11-inch and 13-inch MacBook Air models released during the week of WWDC. Besides less-battery-intensive chipsets, the marquee feature of the new MacBook Air revolves around faster Wi-Fi connectivity thanks to new 802.11ac cards. As with any new product, bugs are plausible. It’s also been noted that new reports claim that the MacBook Air WiFi issues are due to networking issues in Apple’s OS X software.

The following facts are currently in place:

In the United States, Apple Geniuses and Advisors should capture MacBook Air (13-inch, Mid 2013) and MacBook Air (11-inch, Mid 2013) computers with any Wi-Fi issues.

According to a source at Apple, the company is working to independently identify what exactly is causing the new Wi-Fi-related problems. According to the source, AppleCare and Apple Store Genius Bar employees have been instructed to “capture” affected MacBook Air units. These units will then be sent back to Apple for further testing so a solution could hopefully be achieved. While Apple is asking AppleCare and Genius Bar staff to “capture” units facing problems, that does not mean Apple is confirming the new MacBook Air is flawed. This points to Apple pushing to determine why at least some units are seeing Wi-Fi problems.

There have also been reports of at least a couple of customers facing MacBook Air WiFi issues who have successfully swapped out their notebooks for new ones. One of these people has said that AppleCare provided them with a complementary USB-to-Ethernet adapter so the new MacBook Air could connect to the internet without Wi-Fi. Apple also informed these people that their original laptops have been “captured”.

If you’ve picked up Apple’s latest MacBook Air notebook and have any feedback to provide about its 802.11ac Wi-Fi performance, please let us know in the comments.

Skype updated to 6.5.0.443

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Date: Tuesday, June 25th, 2013, 06:25
Category: News, Software

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On Tuesday, version 6.5.0.443 of the Skype VoIP application was released. The new version, a 40 megabyte download, offers the following fixes and changes:
- [Contact] Scroll bar is displayed when sending multiple contacts.

- [Contact] User cannot drag & drop contacts who are already existing participants in the conversation.

- [Calling] Call toolbar + button contextual menu items will is not disabled after sending contact.

- [Calling] Call duration info in history is correctly displayed.

- [Conversation] Chat input field switches to SMS mode when adding PSTN numbers to new conversation.

- [Conversation] ‘Check Spelling While Typing’ setting is saved.

- [Generic] Detached conversation window is opened automatically after restarting Skype.

- [File Transfer] Received file is saved in download folder when custom download folder no longer exists.

- [File Transfer] File transfer control buttons are presented after reconnection.

- [Preferences] Skype does not freeze when switching the ringing output to all devices from USB headset.

Skype 6.5.0.443 is available for free and requires an Intel-based Mac running Mac OS X 10.6 or later to install and run.

If you’ve tried the new version and have any feedback to offer, please let us know in the comments.

OnyX updated to 2.7.0

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Date: Monday, June 24th, 2013, 06:46
Category: News, Software

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An update’s an update.

OnyX, Titanium Software’s popular freeware multifunction utility for Mac OS X, has been updated to version 2.7.0. The new version, a 19 megabyte download, adds the following fixes and changes:
- Deleting the Internet Cache improved.

- Deleting the Fonts Cache improved.

- Deleting the logs improved.

- New version of sqlite3.

- The details listed in the Info pane are now selectable.

- New replacement icon.

- Some bugs corrected.

OnyX 2.7.0 requires an Intel-based processor and OS X 10.8 or later to install and run.

If you’ve tried the new version and have any feedback, please let us know in the comments.

Dropbox updated to 2.2.8

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Date: Monday, June 24th, 2013, 06:47
Category: News, Software

Don’t look a pretty decent bug fix in the mouth.

On Friday, Dropbox released version 2.2.8 of its cloud-based storage client for Mac OS X. The new version, a 23.6 megabyte download (via MacUpdate), which adds the following fixes and changes:
- New notifications badge.

- Refactoring of core sync engine.

- Improved memory usage.

- Startup performance improvements.

- Finder icon overlay improvements.

- Fixed an issue that could cause duplicate folders to be created when non-ascii characters are in the folder name.

- Fixed an issue that caused endless syncing when encountering permissions issues.

- Other minor fixes.

Dropbox 2.2.8 requires Mac OS X 10.4 or later to install and run.

If you’ve tried the new beta and have any feedback to offer, please let us know in the comments.

VirtualBox updated to 4.2.14

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Date: Monday, June 24th, 2013, 06:21
Category: News, Software

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Never knock a steadily updated app.

VirtualBox, an open source x86 virtualization project available for free has just hit version 4.2.14. The new version, a 150 megabyte download, features the following fixes and changes:
- VMM: another TLB invalidation fix for non-present pages.

- VMM: fixed a performance regression (4.2.8 regression; bug #11674).

- GUI: fixed a crash on shutdown.

- GUI: prevent stuck keys under certain conditions on Windows hosts (bugs #2613, #6171).

- VRDP: fixed a rare crash on the guest screen resize.

- VRDP: allow to change VRDP parameters (including enabling/disabling the server) if the VM is paused.

- USB: fixed passing through devices on Mac OS X host to a VM with 2 or more virtual CPUs (bug #7462).

- USB: fixed hang during isochronous transfer with certain devices (4.1 regression; Windows hosts only; bug #11839).

- USB: properly handle orphaned URBs (bug #11207).

- BIOS: fixed function for returning the PCI interrupt routing table (fixes NetWare 6.x guests).

- BIOS: don’t use the ENTER / LEAVE instructions in the BIOS as these don’t work in the real mode as set up by certain guests (e.g. Plan 9 and QNX 4).

- DMI: allow to configure DmiChassisType (bug #11832).

- Storage: fixed lost writes if iSCSI is used with snapshots and asynchronous I/O (bug #11479).

- Storage: fixed accessing certain VHDX images created by Windows 8 (bug #11502).

- Storage: fixed hang when creating a snapshot using Parallels disk images (bug #9617).

- 3D: seamless + 3D fixes (bug #11723).

- 3D: version 4.2.12 was not able to read saved states of older versions under certain conditions (bug #11718).

- Main/Properties: don’t create a guest property for non-running VMs if the property does not exist and is about to be removed (bug #11765).

- Main/Properties: don’t forget to make new guest properties persistent after the VM was terminated (bug #11719).

- Main/Display: don’t lose seamless regions during screen resize.

- Main/OVF: don’t crash during import if the client forgot to call Appliance::interpret() (bug #10845).

- Main/OVF: don’t create invalid appliances by stripping the file name if the VM name is very long (bug #11814).

- Main/OVF: don’t fail if the appliance contains multiple file references (bug #10689).

- Main/Metrics: fixed Solaris file descriptor leak.

- Settings: limit depth of snapshot tree to 250 levels, as more will lead to decreased performance and may trigger crashes.

- VBoxManage: fixed setting the parent UUID on diff images using sethdparentuuid.

- Linux hosts: work around for not crashing as a result of automatic NUMA balancing which was introduced in Linux 3.8 (bug #11610).

- Windows installer: force the installation of the public certificate in background (i.e. completely prevent user interaction) if the –silent command line option is specified.

- Windows Additions: fixed problems with partial install in the unattended case
Windows Additions: fixed display glitch with the Start button in seamless mode for some themes.

- Windows Additions: Seamless mode and auto-resize fixes.

- Windows Additions: fixed trying to to retrieve new auto-logon credentials if current ones were not processed yet.

- Windows Additions installer: added the /with_wddm switch to select the experimental WDDM driver by default.

- Linux Additions: fixed setting own timed out and aborted texts in information label of the lightdm greeter.

- Linux Additions: fixed compilation against Linux 3.2.0 Ubuntu kernels (4.2.12 regression as a side effect of the Debian kernel build fix; bug #11709).

- X11 Additions: reduced the CPU load of VBoxClient in drag’and’drop mode.

- OS/2 Additions: made the mouse wheel work (bug #6793).

- Guest Additions: fixed problems copying and pasting between two guests on an X11 host (bug #11792).

VirtualBox 4.2.14 is available for free and requires an Intel-based Mac running Mac OS X 10.6 or later and an Intel-based Mac to install and run.

If you’ve tried the new version and have any feedback, please let us know.

Apple releases first OS X 10.8.5 build to developer community

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Date: Thursday, June 20th, 2013, 06:03
Category: News, Software

OS X 10.8.5 development is underway.

Per AppleInsider, Apple on Wednesday seeded the first OS X 10.8.5 Mountain Lion beta build to developers, with the latest maintenance update possibly looking to stabilize the operating system ahead of an OS X 10.9 Mavericks launch this fall.

Sources familiar with the beta, dubbed build 12F9, said Apple is asking developers to focus on existing Mountain Lion features, including Wi-Fi and graphics.

The latest beta comes two weeks after Apple issued the OS X Mountain Lion 10.8.4 maintenance update to Mac users, which brought Wi-Fi improvements, compatibility with Microsoft Exchange and a host of bug fixes.

Apple is expected to release the next-generation OS X 10.9 Mavericks this fall, and a preview has already been seeded to the development community.

If you’ve gotten your hands on this build and have any feedback to offer, please let us know in the comments.

Apple releases Java 2013-004 update for Mac OS X 10.7, 10.8 operating systems

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Date: Wednesday, June 19th, 2013, 05:00
Category: News, security, Software

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A well-timed security update never hurts.

On Wednesday, Apple released its Java 2013-004 update for its Mac OS X 10.7 and 10.8 operating systems. The update, a 64 megabyte download, adds the following fixes and changes:
- Java for OS X 2013-004 supersedes all previous versions of Java for OS X.

- This release updates the Apple-provided system Java SE 6 to version 1.6.0_51 and is for OS X versions 10.7 or later.

- This update uninstalls the Apple-provided Java applet plug-in from all web browsers. To use applets on a web page, click on the region labeled “Missing plug-in” to go download the latest version of the Java applet plug-in from Oracle.

- This update also removes the Java Preferences application, which is no longer required to configure applet settings.

The Java 2013-004 update requires an Intel-based Mac running Mac OS X 10.7 to install and run. If you’ve installed this new update and have any feedback to offer, please let us know in the comments.

Google Chrome updated to 27.0.1453.116

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Date: Wednesday, June 19th, 2013, 05:21
Category: News, Software

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Never doubt a good update.

On Tuesday, Google released version 27.0.1453.116 of its Chrome web browser. The update, a 50.4 megabyte download, adds the following fixes and changes:
- [249335] Medium CVE-2013-2866: Clickjacking in the Flash plug-in.

This build also has fixes to the following issues:
- Multiple flash movies on one page not playing [Issue: 243290].

- Arc rendering bug in canvas [Issue: 243996].

- Select box with Multiple option fires Onchange event on scroll [Issue: 244406].

Google Chrome 27.0.1453.116 requires an Intel-based Mac with Mac OS X 10.6 or later to install and run. If you’ve tried the new version and have any feedback to offer, please let us know in the comments.

Parallels Desktop updated to 8.0.18494

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Date: Tuesday, June 18th, 2013, 05:52
Category: MacBook Air, News, Software

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Late Thursday, Parallels released version 8.0.18494 of its Parallels Desktop virtualization software. The new update, a 336.4 megabyte download, adds the following fixes and changes:
- Use Parallels Desktop with OS X 10.9 Mavericks Developer Preview (experimental support).

- Work with Parallels Desktop on new MacBooks Air (Mid-2013).

Parallels Desktop 8 retails for US$79.99 and requires a 64-bit Intel-based processor, Mac OS X 10.6.8 or later, 2GB of RAM (4GB recommended to run Windows 7), at least 700 MB of space available on the boot volume for Parallels Desktop installation and 15 GB of available disk space for Windows.

If you’ve tried the new version and have any feedback to offer, let us know in the comments.