One of the most anticipated features of Mac OS X Leopard amongst the technical community was the port of Sun's DTrace utility for application and system profiling. DTrace is a powerful, low-level dynamic tracing framework that allows system administrators and developers to trace applications for tuning or troubleshooting purposes.
Recently, Adam Leventhal, one of DTrace's initial developers, discovered that Apple's implementation creates a way for a program to exclude itself from being traced. Namely, he was unsuccessful at tracing iTunes, and found that Apple had added a method of disabling probing on certain applications defined with the directive P_LNOATTACH.
Wow. So Apple is explicitly preventing DTrace from examining or recording data for processes which don't permit tracing. This is antithetical to the notion of systemic tracing, antithetical to the goals of DTrace, and antithetical to the spirit of open source. I'm sure this was inserted under pressure from ISVs, but that makes the pill no easier to swallow.
Since the initial publication of the blog entry last week, the story has begun to pop uparoundthe mac web.
The practice is not entirely new to Apple. A commenter on Adam Leventhal's blog noted that Apple used the same directive to prevent GDB tracing on iTunes. Additionally, the implementation of this directive appears to be limited to iTunes (for the moment?), so many are speculating that the move is to protect Apple's FairPlay DRM.
To present an alternate view, Apple has extended Java, Ruby, Python, and Perl to include DTrace support, and Apple has built a GUI front-end called Instruments. Also the issue may eventually become moot with Apple's stated desire to move towards DRM-free music (though DRM video remains common).
Thursday November 27, 2025 1:01 pm PST by Joe Rossignol
Apple's online store is going down for a few hours on a rolling country-by-country basis right now, but do not get your hopes up for new products.
Apple takes its online store down for a few hours ahead of Black Friday every year to tease/prepare for its annual gift card offer with the purchase of select products. The store already went down and came back online in Australia and New Zealand, ...
Tuesday November 25, 2025 7:16 am PST by Joe Rossignol
Apple recently teamed up with Japanese fashion brand ISSEY MIYAKE to create the iPhone Pocket, a limited-edition knitted accessory designed to carry an iPhone. However, it is now completely sold out in all countries where it was released.
iPhone Pocket became available to order on Apple's online store starting Friday, November 14, in the United States, France, China, Italy, Japan, Singapore, ...
Friday November 28, 2025 7:33 am PST by Joe Rossignol
While all Macs are now powered by Apple's custom-designed chips, a new rumor claims that Apple may rekindle its partnership with Intel, albeit in a new and limited way.
Apple supply chain analyst Ming-Chi Kuo today said Intel is expected to begin shipping Apple's lowest-end M-series chip as early as mid-2027.
Kuo said Apple plans to utilize Intel's 18A process, which is the "earliest...
We've been focusing on deals on physical products over the past few weeks, but Black Friday is also a great time of year to purchase a streaming membership. Some of the biggest services have great discounts for new and select returning members this week, including Apple TV, Disney+, Hulu, Paramount+, Peacock, and more.
Note: MacRumors is an affiliate partner with some of these vendors. When...
Thursday November 27, 2025 3:14 am PST by Tim Hardwick
Apple's disappointing iPhone Air sales are causing major Chinese mobile vendors to scrap or freeze their own ultra-thin phone projects, according to reports coming out of Asia.
Since the iPhone Air launched in September, there have been reports of poor sales and manufacturing cuts, while Apple's supply chain has scaled back shipments and production.
Apple supplier Foxconn has...
Cellular carriers have always offered big savings on the newest iPhone models during the holidays, and Black Friday 2025 sales have kicked off at AT&T, Verizon, T-Mobile, and more. Right now we're tracking notable offers on the iPhone 17, iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air. For even more savings, keep an eye on older models during the holiday shopping season.
Note: MacRumors is...
Tuesday November 25, 2025 7:09 am PST by Tim Hardwick
Apple's first foldable iPhone is expected to launch alongside the iPhone 18 Pro models in fall 2026, and it's shaping up to include three standout features that could set it apart from the competition.
The book-style foldable will reportedly feature an industry-first 24-megapixel under-display camera built into the inner display, according to a recent JP Morgan equity research report. That...
