macOS Catalina 10.15.6 Apple Operating System Download Official System Image Activation Version

macOS Catalina（版本 10.15）是苹果公司为 Mac 电脑开发的一款重要操作系统。它并非单一的应用软件，而是一个完整的系统平台，引入了多项革命性功能，例如将 iTunes 拆分为独立的“音乐”、“播客”和“视频”应用，推出了“随航”功能以将 iPad 变为第二屏幕，并通过“Mac Catalyst”技术将更多 iPad 应用带到 Mac 上。本文将从核心界面、典型工作流程、进阶技巧及问题解决等方面，为您提供一份详尽的指南。

一、核心界面与工作区详解

macOS Catalina 的界面延续了苹果简洁、直观的设计哲学，同时引入了新的应用和交互逻辑。对于初次接触该系统的用户，理解这些基础元素是高效使用 Mac 的第一步。我们建议您花几分钟熟悉以下区域，它们构成了您日常操作的核心。

1.1 桌面与程序坞

• 桌面：文件与文件夹的存放区域，支持“叠放”功能（在桌面右键选择“使用叠放”），可自动按类型、日期等规则整理文件。这能极大提升文件检索效率，避免桌面杂乱无章。
• 程序坞：屏幕底部的快捷启动栏。左侧放置常用应用程序，右侧是最近使用的应用程序和最小化窗口的缩略图，最右侧是“废纸篓”。您可以通过拖拽来添加或移除应用。若想调整程序坞大小，可进入“系统偏好设置”中的“程序坞与菜单栏”进行微调。

1.2 菜单栏与通知中心

• 菜单栏：位于屏幕顶部，左侧显示当前活跃应用的菜单，右侧是状态菜单（如 Wi-Fi、电池、时间等）。菜单栏是执行应用命令和控制系统状态的核心枢纽。
• 通知中心：点击菜单栏右侧的时间日期区域或使用双指从触控板右边缘向左轻扫打开。包含“今天”视图（小组件）和所有通知。您可以在通知中心底部点击“编辑小组件”来个性化显示天气、日历、股票等信息。

1.3 访达

访达是管理所有文件的中心。Catalina 中的访达边栏有了显著变化：

• 位置：显示连接的设备、本地磁盘和网络位置。这包括您插入的 U 盘、外接硬盘以及网络上的共享文件夹。
• iCloud 云盘：直接访问 iCloud 中的文件，并新增“桌面”与“文稿”文件夹的同步选项。这意味着您可以在不同 Mac 设备间无缝切换工作。
• 标签：快速访问标记了颜色的文件。您可以在访达偏好设置中自定义标签名称，例如将“红色”标签重命名为“紧急项目”。

1.4 全新独立媒体应用

iTunes 被拆分为三个独立应用：

• 音乐：界面专注于 Apple Music 服务和本地音乐库管理。您可以通过它浏览数百万首歌曲，或管理您从 CD 导入的个人收藏。
• 播客：用于订阅、发现和收听播客节目。支持自动下载最新剧集，让您不会错过任何精彩内容。
• 视频（或“Apple TV”）：用于购买、租赁电影和观看 Apple TV+ 内容。它还支持家庭共享，让全家人都能观看已购内容。

1.5 系统偏好设置

系统控制中枢。Catalina 中新增或更新了多个面板：

• 屏幕使用时间：监控并管理你在 Mac 及各应用上的使用时长。您可以为自己或孩子设定应用使用限制，培养健康的数字习惯。
• Apple ID：集中管理 iCloud、媒体与购买项目、家人共享等。这是您所有苹果服务的统一入口。
• 随航：设置与 iPad 的连接，将其用作扩展显示器或镜像显示器。这为需要双屏工作的用户提供了极具性价比的解决方案。

二、从启动到完成工作的核心操作流程

以下以创建一个备忘录并利用“随航”功能在 iPad 上使用 Apple Pencil 标记为例，展示典型工作流。这套流程完整覆盖了从应用启动到内容输出的全过程。

2.1 启动应用程序

1. 方法一（程序坞）：在程序坞上点击“备忘录”图标。这是最直观的启动方式，适合常用应用。
2. 方法二（启动台）：按下键盘上的 F4 键（或触控板四指捏合），在启动台中找到并点击“备忘录”。启动台以网格形式展示所有应用，适合寻找不常用的软件。
3. 方法三（聚焦搜索）：按下 Command (⌘) + 空格键，输入“备忘录”，按回车键启动。这是启动任何应用最快的方式，无需离开键盘。

2.2 创建新备忘录并编辑

1. 在“备忘录”应用窗口中，点击工具栏左侧的“新建备忘录”按钮（或按 Command (⌘) + N）。
2. 输入标题和正文内容。您可以使用格式菜单调整字体、添加列表或插入表格。
3. 添加附件：将文件直接拖拽到备忘录中，或点击工具栏的“附件”按钮插入图片、视频等。备忘录支持扫描文档功能，可直接通过 Mac 摄像头拍摄并插入。

2.3 启用“随航”功能扩展工作区

1. 确保 Mac 和 iPad 登录了同一个 Apple ID，并开启蓝牙和 Wi-Fi。这是实现“随航”功能的基础条件。
2. 在 Mac 上，点击菜单栏的“控制中心”图标（或按 F6 键调出调度中心）。
3. 点击“显示器”模块，在列表中选择你的 iPad。此时 iPad 屏幕将变为 Mac 的扩展桌面。您可以在“系统偏好设置”的“随航”面板中调整 iPad 在 Mac 屏幕的左侧还是右侧。

2.4 Use Apple Pencil for Marking on iPad

1. On iPad, tap the Notes that you moved over.
2. Insert an image or PDF into the Notes. You can drag files from Finder directly into the Notes.
3. Double-click the image/PDF, and a toolbar of marking tools will pop up at the top.
4. Use Apple Pencil to draw, color, sign, or add text. All changes are synced in real-time to the Mac’s original Notes. You can also use finger zooming or scrolling on iPad.

2.5 Save and Export

1. Automatic Save: The Notes app automatically saves all changes. You don’t need to manually click the Save button.
2. Export Notes:
   • Select the Notes you want to export.
   • Click the menu bar’s “File” -> “Export as PDF”… (or choose other formats).
   • Select the save location, and click “Save”. You can also choose to export as Word or plain text format.
3. Disconnect from AirPlay: In the Mac’s menu bar, click “Control Center” -> “Display”, then click “Disconnect from [Your iPad Name]”. You can also disconnect from iPad through the Control Center on iPad.

Three, Advanced Features

Mastering these advanced techniques can significantly enhance your productivity. Many users discover hidden treasures after using Mac for months.

3.1 Deep Use of Spotlight Search

• Press Command (⌘) + Spacebar to open Spotlight Search, which can not only launch applications and find files, but also:
  • Perform currency and unit conversions (e.g., input “100USD to CNY”). It supports over 200 currencies and multiple units of measurement.
  • Execute simple calculations (directly input the formula). Supports addition, subtraction, multiplication, division, and exponentiation.
  • Search for emails, contacts, system settings. You can even preview email contents directly in the search results.
• Press Command (⌘) + Enter on the search result to directly open the folder containing the file. This tip is very practical when you need to quickly locate file paths.

3.2 Quick Operations in Finder

• Select a file in Finder, click the “Quick Actions” button in the toolbar (or preview it by pressing the spacebar), and you can directly rotate images, mark PDFs, or edit audio/video clips (without opening professional software). This greatly simplifies daily file processing.
• Use Finder Tags: Add colored tags to files (right-click the file -> choose the tag color), and you can quickly filter files in the sidebar’s “Tags” category. You can assign different colors to different projects or priorities for efficient visual management.

3.3 Split View and Dock

• Split View: Long press the green full-screen button in the top-left corner of a window to choose to split the current window into the left or right side, then fill the other side with another window. Press Esc or click the green button again to exit. This is especially useful for document comparison or reading.
• Dock: Press F3 (or swipe up with three or four fingers on the touch bar) to enter the Dock, where you can see all open windows and desktop spaces. This makes it easy to switch between them. You can also create additional desktop spaces on the top of the screen for different themes of work.

3.4 Seamless Integration: Sketch and Marking

• Right-click any place in Mac where you can insert images (such as in an email or Pages document), choose “Insert from iPhone or iPad” -> “Add Sketch”. Your iPhone or iPad will automatically turn on and enter the drawing interface. After drawing, click “Finish”, and the sketch will automatically insert into the Mac document. This feature seamlessly combines hand-drawn sketches with digital documents.

Four, Common Issues and Solutions

Based on user feedback, here are the five most common issues encountered when using macOS Catalina, along with their solutions. These methods have been tested and verified.

4.1 “AirPlay” Function Cannot Connect or Is Laggy

• Issue: The iPad option is not visible in the Control Center, or the connection is very laggy.
• Solution:
  1. Ensure both devices are logged in with the same Apple ID and have Bluetooth and Wi-Fi enabled. This is the most common oversight.
  2. In the Mac’s “System Preferences” -> “AirPlay”, check the device list. If the iPad is not displayed, try restarting both devices.
  3. Try turning off Bluetooth and Wi-Fi on both devices for 10 seconds, then turn them back on. This can refresh the network connection status.
  4. Ensure the devices are close to each other and not affected by severe wireless signal interference. Metal objects or devices like microwave ovens can cause interference.

4.3 iCloud Cloud Drive Synchronization Issues

• Problem: Files in the desktop or document folders are not synced across iCloud devices.
• Solution:
  1. Check the Apple ID login status: Go to “System Preferences” -> “Apple ID”. Confirm that you are logged in successfully.
  2. In the “iCloud” settings, ensure that “iCloud Cloud Drive” is selected, and click “Options…” to confirm that “Desktop & Documents Folders” is enabled. This is the switch for the synchronization feature.
  3. Check if your Mac has enough storage space and iCloud storage space. If the space is insufficient, synchronization will be paused.

4.4 System Performance Issues

• Problem: The system feels slower after upgrading to Catalina.
• Solution:
  1. Check the “Activity Monitor” (you can open it via Spotlight search). Look for processes that are using a high amount of CPU or memory. For example, some third-party applications may have memory leaks.
  2. Clear the launch items: Go to “System Preferences” -> “Users & Groups” -> “Login Items”, and remove unnecessary launch applications. Having too many launch items can slow down the startup process.
  3. Ensure there is enough available disk space (at least 10-15% of the total capacity is recommended). Insufficient disk space can cause frequent system swap files, affecting performance.

4.5 How to Create a macOS Catalina Boot Disk

• Problem: Need to install the system from a USB drive or external hard drive.
• Solution:
  1. Prepare a USB drive of at least 16GB, and format it as “Mac OS Extended (Journaled)”.
  2. Download the macOS Catalina installation program from the App Store, which will be automatically placed in the “Applications” folder.
  3. Open the “Terminal” application, and enter the command: sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume. Replace “MyVolume” with your USB drive name.
  4. Press Enter and enter your administrator password. The process will take approximately 15-20 minutes to complete.

Five, macOS Catalina Core Keyboard Shortcuts Summary

Mastering these shortcuts can significantly enhance your operational efficiency. It is recommended that you save this table to your desktop or print it out for easy reference.

Sixth, Practical Case: Efficiently Creating a PowerPoint Presentation with Hand-Drawn Diagrams

Assume you need to create a presentation for your team about product design, which includes hand-drawn diagrams. Here is the complete process of using the macOS Catalina features to accomplish this task:

1. Launch Keynote and Create Outline: Quickly start Keynote using focus search and utilize the split-screen browsing feature to place Keynote and Safari side by side for reference during the creation process.
2. Draw Diagrams on iPad: On Mac, open the slide where you need to insert an image. Right-click on an empty area, choose “Insert from iPhone or iPad” -> “Add Sketch”. Your iPad will automatically turn on and enter drawing mode.
3. Use Apple Pencil for Fine-Tuning: Use Apple Pencil to draw product sketches on iPad. You can adjust colors and strokes at any time using the marker toolbar. After completing the sketch, it will instantly appear on the Mac’s slide.
4. Use “Sidecar” to Expand Workspace: Use iPad as a second screen. Drag the Keynote “Notes” window to the iPad screen so that during the presentation, you can see the notes on iPad while the audience only sees the slides on Mac.
5. Export and Share: After completing the presentation, click “File” -> “Export As” -> “PDF” or “PowerPoint”, choose the save location. You can also share directly through the “Share” menu via email or AirDrop to team members.

Through this detailed guide, you should have a deeper understanding of macOS Catalina. From core interfaces to advanced techniques, and even common issues, we strive to cover every aspect of your daily use. If you encounter any issues during installation or use, feel free to leave a message below. Our technical team will respond promptly to your inquiries.