Security researchers have recently uncovered security issues known by two names, Meltdown and Spectre. These issues apply to all modern processors and affect nearly all computing devices and operating systems. All Mac systems and iOS devices are affected, but there are no known exploits impacting customers at the time of this writing. Since exploiting many of these issues requires a malicious app to be loaded on your Mac or iOS device, we recommend downloading software only from trusted sources such as the App Store.
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Apple has already released mitigations in iOS 11.2, macOS 10.13.2, and tvOS 11.2 to help defend against Meltdown. Security updates for macOS Sierra and OS X El Capitan also include mitigations for Meltdown. To help defend against Spectre, Apple has released mitigations in iOS 11.2.2, the macOS High Sierra 10.13.2 Supplemental Update, and Safari 11.0.2 for macOS Sierra and OS X El Capitan. Apple Watch is not affected by either Meltdown or Spectre.
We continue to develop and test further mitigations for these issues.
Background
The Meltdown and Spectre issues take advantage of a modern CPU performance feature called speculative execution. Speculative execution improves speed by operating on multiple instructions at once—possibly in a different order than when they entered the CPU. To increase performance, the CPU predicts which path of a branch is most likely to be taken, and will speculatively continue execution down that path even before the branch is completed. If the prediction was wrong, this speculative execution is rolled back in a way that is intended to be invisible to software.
The Meltdown and Spectre exploitation techniques abuse speculative execution to access privileged memory—including that of the kernel—from a less-privileged user process such as a malicious app running on a device.
Meltdown
Meltdown is a name given to an exploitation technique known as CVE-2017-5754 or 'rogue data cache load.' The Meltdown technique can enable a user process to read kernel memory. Our analysis suggests that it has the most potential to be exploited. Apple released mitigations for Meltdown in iOS 11.2, macOS 10.13.2, and tvOS 11.2, and also in Security Update 2018-001 for macOS Sierra and Security Update 2018-001 for OS X El Capitan. watchOS did not require mitigation.
Our testing with public benchmarks has shown that the changes in the December 2017 updates resulted in no measurable reduction in the performance of macOS and iOS as measured by the GeekBench 4 benchmark, or in common Web browsing benchmarks such as Speedometer, JetStream, and ARES-6.
Spectre
Spectre is a name covering multiple different exploitation techniques, including—at the time of this writing—CVE-2017-5753 or 'bounds check bypass,' and CVE-2017-5715 or 'branch target injection,' and CVE-2018-3639 or “speculative bounds bypass.” These techniques potentially make items in kernel memory available to user processes by taking advantage of a delay in the time it may take the CPU to check the validity of a memory access call.
Analysis of these techniques revealed that while they are extremely difficult to exploit, even by an app running locally on a Mac or iOS device, they can be potentially exploited in JavaScript running in a web browser. On January 8th Apple released updates for Safari on macOS and iOS to mitigate such timing-based techniques. Testing performed when the Safari mitigations were released indicated that the mitigations had no measurable impact on the Speedometer and ARES-6 tests and an impact of less than 2.5% on the JetStream benchmark. We continue to develop and test further mitigations within the operating system for the Spectre techniques. watchOS is unaffected by Spectre.
Don’t Just Streamline Your Workflow… JetStream it!
JetStream Finale Controller is specifically designed to increase your speed and productivity in Finale. JetStream works with Elgato’s 15-key Stream Deck Mobile app for iOS and Android or 15-key Stream Deck hardware.
Finale professionals who have invested in Elgato’s 32-key Stream Deck XL hardware can harness the power of the enhanced JetStream proXL, which features a 4×8 button matrix for even more efficient navigation and enhanced productivity.
If you are a Mac user who works with Keyboard Maestro, we’ve even created a version for you (which can also work in tandem with the Stream Deck versions as well as your existing shortcuts) containing nearly 500 power-user functions.
Looking for the upcoming Touch Portal version of JetStream? Please reach out via email, and visit the Touch Portal Support Channel on Discord for more information.
All versions of Jetstream itself are FREE.
JetStream’s one-touch operation lets you enter notes, add dynamics, articulations, phrase marks, edit content, and much more.
Tactile and visual feedback eliminates the need to map and memorize keyboard shortcuts.
There are nearly 1000 functions in version 1 of JetStream, including over 400 powerful Lua macro scripts to enhance your productivity.
If you already use a macro program like Keyboard Maestro or AutoHotkey, we have great news for you.
JetStream Finale Controller works seamlessly alongside these for both Mac and PC, allowing you to use JetStream Finale Controller with your existing keyboard shortcuts to increase your productivity options even more.
And JetStream KM, our Keyboard Maestro version of JetStream has over 400 macros already set up for you to assign triggers to any way you’d like.
JetStream Finale Controller is a community-driven project of Finale users with very diverse backgrounds. We are all working together to bring this comprehensive free automation tool to the Finale user community. (The Stream Deck hardware, iOS or Android subscription or Keyboard Maestro macro program are your out of pocket cost).
Jetstream Mac Os Catalina
Our grassroots team is made up of professional music copyists and engravers; composers, arrangers, orchestrators, musicians and educators, and of course, programmers.
Don’t just take our word for it. Read this review of JetStream by a professional note-setter:
“Jet-Setting with JetStream Finale Controller” by Engraver’s Mark Music
We think you will be blown away by the increase in productivity JetStream will give you in Finale. We encourage you to share information about JetStream Finale Controller and this site with other Finale users.
Sign up below to Download JetStream Finale Controller, and please subscribe to the JetStream Finale Controller YouTube channel and join the JetStream Finale Facebook Group for general support and discussion.
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Be sure to sign up now for access to downloads and info, if you haven’t already.
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Please Read Our Disclaimer:
JetStream is only compatible with the English version of Finale. This is because it sends commands to Finale’s menus.
JetStream has not been tested with Apple’s Big Sur operating system. While the basic tool selection and other keyboard commands should function as normal, installation of the JW Lua plugin in Big Sur is not straightforward, and Lua scripts may not function as they do in earlier versions of OS X.
Ongoing development of JetStream Finale Controller, and the JetStream software product itself is completely and totally separate from Finale, MakeMusic, Stream Deck, Elgato Gaming, Keyboard Maestro, Stairways Software or their affiliates. No financial, tech support or other arrangements have been made with these companies.
Use the JetStream at your own risk. We’re not responsible for any adverse consequences. It’s freeware, after all! ¯_(ツ)_/¯
Beta testing is currently closed for the JetStream Finale Controller for Stream Deck platform. If you are interested in becoming a beta tester for JetStream Finale Controller v2, a new test cycle will be announced in due course. Please reach out to us on our Facebook Page for more info about being a beta tester.