Apple previously released security updates to defend against Spectre—a series of speculative execution vulnerabilities affecting devices with ARM-based and Intel CPUs. Intel has disclosed additional Spectre vulnerabilities, called Microarchitectural Data Sampling (MDS), that apply to desktop and notebook computers with Intel CPUs, including all modern Mac computers.
macOS Mojave 10.14.5 includes security updates for Safari, and the option to enable full mitigation, as described below.
Security Update 2019-003 High Sierra and Security Update 2019-003 Sierra include the option to enable full mitigation.
Dell's interest in Mac OS X raises numerous questions about how such a partnership would work. Dell's current PC product strategy is famously one-sided: Microsoft Corp.' S Windows operating system.
Using a System with Mac OS X to recover a Dell PC When you have to troubleshoot and recover a Dell PC to full working order, there are a few technical minimum requirements that are needed to access the various tools and utilities that Dell has put together to aid you. What You'll Need. Dell Mini 9 With 16GB SSD or higher (8GB SSDs will techincally work, but it will take some fiddling not covered by this guide). Retail copy of OS X 10.5.x (NOT an OEM copy.
About security fixes in macOS Mojave
macOS Mojave 10.14.5 fixes this issue for Safari with no measurable performance impact.1 This update prevents exploitation of these vulnerabilities via JavaScript or as a result of navigating to a malicious website in Safari.
Customers can also protect their Mac by updating security settings in macOS to download apps only from the App Store. This setting helps prevent the installation of apps that could potentially exploit these vulnerabilities. All apps from the App Store are signed by Apple to ensure that they haven’t been tampered with or altered. Learn how to view and change app security settings on your Mac.
Although there are no known exploits affecting customers at the time of this writing, customers with computers at heightened risk or who run untrusted software on their Mac can optionally enable full mitigation to prevent harmful apps from exploiting these vulnerabilities. Full mitigation requires using the Terminal app to enable an additional CPU instruction and disable hyper-threading processing technology. This capability is available for macOS Mojave, High Sierra, and Sierra in the latest security updates and may reduce performance by up to 40 percent2, with the most impact on intensive computing tasks that are highly multithreaded. Learn how to enable full mitigation.
Unsupported Mac models
These Mac models may receive security updates in macOS Mojave, High Sierra or Sierra, but are unable to support the fixes and mitigations due to a lack of microcode updates from Intel.
- MacBook (13-inch, Late 2009)
- MacBook (13-inch, Mid 2010)
- MacBook Air (13-inch, Late 2010)
- MacBook Air (11-inch, Late 2010)
- MacBook Pro (17-inch, Mid 2010)
- MacBook Pro (15-inch, Mid 2010)
- MacBook Pro (13-inch, Mid 2010)
- iMac (21.5-inch, Late 2009)
- iMac (27-inch, Late 2009)
- iMac (21.5-inch, Mid 2010)
- iMac (27-inch, Mid 2010)
- Mac mini (Mid 2010)
- Mac Pro (Mid 2010)
- Mac Pro (Mid 2012)
1 Safari performance: Testing conducted by Apple in May 2019 showed that these updates resulted in no measurable reduction in Safari performance using common Web browsing benchmarks such as Speedometer, JetStream, and MotionMark.
2 macOS performance: Testing conducted by Apple in May 2019 showed as much as a 40% reduction in performance with tests that include multithreaded workloads and public benchmarks. Performance tests are conducted using specific Mac computers. Actual results will vary based on model, configuration, usage, and other factors.
![Mac Mac](/uploads/1/3/4/7/134769584/495424266.jpg)
You can make all of your displays mirror each other, or extend your workspace with different apps and windows on each display. If you use an external display with your Mac notebook, you can also use closed-display mode.
![Mac Mac](/uploads/1/3/4/7/134769584/219650266.jpg)
Check your requirements
- Check the ports on your Mac to find out whether you need an adapter.
- Check how many displays your Mac supports: Choose Apple menu > About This Mac, click Support, then click Specifications. On the webpage that appears, the number of displays your Mac supports appears under Video Support.
Use extended desktop mode
Maximize your workspace with extended desktop mode, which lets you enjoy full-screen apps and windows on each monitor. Then, use Mission Control to organize apps and windows across your displays. If your Dock is on the bottom of your screen, it appears on any of your displays when you move your pointer to the bottom edge of your display.
Turn on extended desktop mode
- Make sure that your external display is turned on and connected to your Mac.
- Choose Apple menu > System Preferences, then click Displays.
- Click the Arrangement tab.
- Make sure that the Mirror Displays checkbox isn’t selected.
Arrange your displays or change your primary display
So that you can move apps and windows across your displays in one continuous motion, arrange your displays to match the setup on your desk. You can also change your primary display, which is where your desktop icons and app windows first appear.
- Choose Apple menu > System Preferences, then click Displays.
- Click the Arrangement tab.
- To change the position of a display, drag it to the desired position. A red border appears around the display as it's moved.
- To set a different display as the primary display, drag the menu bar to the other display.
Use video mirroring
With video mirroring, all of your displays show the same apps and windows.
Turn on video mirroring
- Make sure that your external display is turned on and connected to your Mac.
- Choose Apple menu > System Preferences, click Displays, then click the Arrangement tab.
- Make sure that the Mirror Displays checkbox is selected.
Use AirPlay
Mac Os Dell Xps 13
With Apple TV, you can mirror the entire display of your Mac to your TV, or use your TV as a separate display. To turn on AirPlay, follow these steps:
- Make sure that your TV is turned on.
- Choose in the menu bar, then choose your Apple TV. If an AirPlay passcode appears on your TV screen, enter the passcode on your Mac.
- Mirror your display or use your TV as a separate display:
- To mirror your display, choose , then choose Mirror Built-in Display.
- To use your TV as a separate display, choose , then choose Use As Separate Display.
- To turn off AirPlay, choose , then choose Turn AirPlay Off.
Mac Os For Dell Inspiron
If you don't see in the menu bar, choose Apple menu > System Preferences, click Displays, then select the 'Show mirroring options in the menu bar when available' checkbox.
Learn more about how to AirPlay video from your Mac.