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    Home»Learning Resources»macOS Apprentice [SUBSCRIBER]

    macOS Apprentice [SUBSCRIBER]

    July 4, 2025

    <p><em>macOS Apprentice</em> is a series of multi-chapter tutorials where you’ll learn about developing native
    macOS apps in Swift, using both SwiftUI — Apple’s newest user interface technology — and AppKit — the
    venerable UI framework. Along the way, you’ll learn several ways to execute Swift code and you’ll build
    two fully featured apps from scratch.</p>
    <p>If you’re new to macOS and Swift, or to programming in general, learning how to write an app can seem
    incredibly overwhelming.</p>
    <p>That’s why you need a guide that:</p>
    <ul>
    <li>Shows you how to write an app step-by-step.</li>
    <li>Uses tons of illustrations and screenshots to make everything clear.</li>
    <li>Guides you in a fun and easy-going manner.</li>
    </ul>
    <p>You’ll start at the very beginning. The first section assumes you have little to no knowledge of programming in Swift.
    It walks you through installing Xcode and then teaches you the basics of the Swift programming language. Along the way,
    you’ll explore several different ways to run Swift code, taking advantage of the fact that you’re developing natively
    on macOS.</p>
    <p><em>macOS Apprentice</em> doesn’t cover every single feature of macOS; it focuses on the absolutely essential ones.
    Instead of just covering a list of features, <em>macOS Apprentice</em> does something much more important: It explains how all the
    building blocks fit together and what is involved in building real apps. You’re not going to create quick example programs that
    demonstrate how to accomplish a single feature. Instead, you’ll develop complete, fully-formed apps, while exploring many of
    the complexities and joys of programming macOS.</p>
    <h3>How is this book different than macOS by Tutorials?</h3>
    <p>Our other book on building apps for macOS, <a href="https://troz.net/books/macos_tutorials/">macOS by Tutorials</a>, is designed
    for developers who have a solid background in iOS development and are looking to make the leap to developing native macOS apps.</p>
    <p>This book, <em>macOS Apprentice</em>, is designed to teach new developers how to build macOS apps while assuming they have little to
    no experience with Swift or any other part of the Apple development ecosystem.</p>

    Source: Read More

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    CVE-2025-32983 – NETSCOUT nGeniusONE Information Disclosure Vulnerability

    Common Vulnerabilities and Exposures (CVEs)

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    Highlights

    CVE-2025-38165 – Linux BPF Sockmap Panic Vulnerability

    July 3, 2025

    CVE ID : CVE-2025-38165

    Published : July 3, 2025, 9:15 a.m. | 2 hours, 14 minutes ago

    Description : In the Linux kernel, the following vulnerability has been resolved:

    bpf, sockmap: Fix panic when calling skb_linearize

    The panic can be reproduced by executing the command:
    ./bench sockmap -c 2 -p 1 -a –rx-verdict-ingress –rx-strp 100000

    Then a kernel panic was captured:
    ”’
    [ 657.460555] kernel BUG at net/core/skbuff.c:2178!
    [ 657.462680] Tainted: [W]=WARN
    [ 657.463287] Workqueue: events sk_psock_backlog
    …
    [ 657.469610]
    [ 657.469738] ? die+0x36/0x90
    [ 657.469916] ? do_trap+0x1d0/0x270
    [ 657.470118] ? pskb_expand_head+0x612/0xf40
    [ 657.470376] ? pskb_expand_head+0x612/0xf40
    [ 657.470620] ? do_error_trap+0xa3/0x170
    [ 657.470846] ? pskb_expand_head+0x612/0xf40
    [ 657.471092] ? handle_invalid_op+0x2c/0x40
    [ 657.471335] ? pskb_expand_head+0x612/0xf40
    [ 657.471579] ? exc_invalid_op+0x2d/0x40
    [ 657.471805] ? asm_exc_invalid_op+0x1a/0x20
    [ 657.472052] ? pskb_expand_head+0xd1/0xf40
    [ 657.472292] ? pskb_expand_head+0x612/0xf40
    [ 657.472540] ? lock_acquire+0x18f/0x4e0
    [ 657.472766] ? find_held_lock+0x2d/0x110
    [ 657.472999] ? __pfx_pskb_expand_head+0x10/0x10
    [ 657.473263] ? __kmalloc_cache_noprof+0x5b/0x470
    [ 657.473537] ? __pfx___lock_release.isra.0+0x10/0x10
    [ 657.473826] __pskb_pull_tail+0xfd/0x1d20
    [ 657.474062] ? __kasan_slab_alloc+0x4e/0x90
    [ 657.474707] sk_psock_skb_ingress_enqueue+0x3bf/0x510
    [ 657.475392] ? __kasan_kmalloc+0xaa/0xb0
    [ 657.476010] sk_psock_backlog+0x5cf/0xd70
    [ 657.476637] process_one_work+0x858/0x1a20
    ”’

    The panic originates from the assertion BUG_ON(skb_shared(skb)) in
    skb_linearize(). A previous commit(see Fixes tag) introduced skb_get()
    to avoid race conditions between skb operations in the backlog and skb
    release in the recvmsg path. However, this caused the panic to always
    occur when skb_linearize is executed.

    The “–rx-strp 100000″ parameter forces the RX path to use the strparser
    module which aggregates data until it reaches 100KB before calling sockmap
    logic. The 100KB payload exceeds MAX_MSG_FRAGS, triggering skb_linearize.

    To fix this issue, just move skb_get into sk_psock_skb_ingress_enqueue.

    ”’
    sk_psock_backlog:
    sk_psock_handle_skb
    skb_get(skb)
    Severity: 0.0 | NA

    Visit the link for more details, such as CVSS details, affected products, timeline, and more…

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