Sorry Dan, altering the date via terminal was a lost of time. It didn't work for me. What did work was using a bootable usb. In a friend's Mac, download the desired OS installer (High Sierra in my case for my MacBook Pro Late 2011 - google 'How to Download a Full macOS High Sierra Installer App') and create the bootable USB, HDD or even SSD with Disk Creator (2 steps very friendly freeware. Mac OS X Lion couldn’t be installed, because the disk (volume name) is damaged and can’t be repaired. Click restart to restart your computer and try installing again. Sometimes people may find an application missing that was included with the OS X installation. If this happens there are several ways to restore the missing application. Once you are in OS X Utilities, select the Disk Utility option. In Disk Utility, select the drive containing the existing Macintosh HD partition, and then click the Erase button. Format the drive as OS X Extended (Journaled) with the GUID Partition Map. Once the drive has been erased and reformatted, exit Disk Utility.
When you upgrade to macOS Catalina, you get more of everything you love about Mac. Experience dedicated apps for music, TV, and podcasts. Smart new features in the apps you use every day. And Sidecar, which lets you use iPad as a second Mac display. Best of all, upgrading is free and easy.
Chances are, your Mac can run macOS Catalina.
Mac computers with Metal-capable graphics processors (GPUs) can upgrade to macOS Catalina.
Make sure you’re ready to upgrade.
Before you upgrade, we recommend that you back up your Mac. Then, if your Mac is running OS X Mavericks 10.9 or later, you can upgrade directly to macOS Catalina.
Upgrading is free. And easier than you think.
Upgrading from macOS Mojave?
Go to Software Update in System Preferences to find the macOS Catalina upgrade. Click Upgrade Now and follow the onscreen instructions to begin your upgrade. If you don’t have broadband access, you can upgrade your Mac at any Apple Store.
Upgrading from an older version of macOS?
If you’re running High Sierra (10.13), Sierra (10.12), or El Capitan (10.11), upgrade to macOS Catalina from the App Store. If you’re running Lion (10.7) or Mountain Lion (10.8), you will need to upgrade to El Capitan (10.11) first. If you don’t have broadband access, you can upgrade your Mac at any Apple Store. Download aurora for power pc mac g4.
OS X 10.9 or later
4GB of memory
12.5GB of available storage (OS X El Capitan 10.11.5 or later)*
Some features require an Apple ID; terms apply.
Some features require a compatible internet service provider; fees may apply.
For details about your Mac model, click the Apple icon at the top left of your screen and choose About This Mac. These Mac models are compatible with macOS Catalina:
MacBook (Early 2015 or newer)
MacBook Air (Mid 2012 or newer)
MacBook Pro (Mid 2012 or newer)
Mac mini (Late 2012 or newer)
iMac (Late 2012 or newer)
iMac Pro (2017)
Mac Pro (Late 2013 or newer)
Siri
Requires a broadband internet connection and microphone (built-in or external).
Hey Siri
Supported by the following Mac models:
MacBook Pro (2018 or newer)
MacBook Air (2018 or newer)
iMac Pro
Dictation, Voice Control, and Voice Memos
Requires a microphone (built-in or external).
Spotlight Suggestions
Requires a broadband internet connection.
Gestures
Requires a Multi-Touch trackpad, Force Touch trackpad, Magic Trackpad, or Magic Mouse.
Force Touch gestures require a Force Touch trackpad.
VoiceOver gestures require a Multi-Touch trackpad, Force Touch trackpad, or Magic Trackpad. Mac os catalina download but not install.
Photo Booth
Requires a FaceTime or iSight camera (built-in or external), or USB video class (UVC) camera.
FaceTime
Audio calls require a microphone (built-in or external) and broadband internet connection. Tomb raider angel of darkness mac download.
Video calls require a built-in FaceTime camera, an iSight camera (built-in or external), or a USB video class (UVC) camera; and broadband internet connection.
Apple TV
Dmg s dmg m pathfinder. High Dynamic Range (HDR) video playback is supported by the following Mac models:
MacBook Pro (2018 or newer)
iMac Pro (2017)
Mac Pro (2019) with Pro Display XDR
Dolby Atmos soundtrack playback is supported by the following Mac models:
MacBook Air (2018 or newer)
MacBook Pro (2018 or newer)
Sidecar
Supported by the following Mac models:
MacBook (2016 or newer)
MacBook Air (2018 or newer)
MacBook Pro (2016 or newer)
Mac mini (2018 or newer)
iMac (late 2015 or newer)
iMac Pro (2017 or newer)
Mac Pro (2019)
Supported by all iPad models with Apple Pencil support:
12.9-inch iPad Pro
11-inch iPad Pro
10.5-inch iPad Pro
9.7-inch iPad Pro
iPad (6th generation or later)
iPad mini (5th generation)
iPad Air (3rd generation)
Continuity Camera
Requires an iPhone or iPad with a Lightning connector and iOS 12 or later.
Continuity Sketch and Continuity Markup
Requires an iPhone with iOS 13 or an iPad with iPadOS.
Handoff
Requires an iPhone or iPad with a Lightning connector and iOS 8 or later.
Instant Hotspot
Requires an iPhone or iPad with cellular connectivity, a Lightning connector, and iOS 8.1 or later. Requires Personal Hotspot service through your carrier.