If an icon in OS X El Capitan is locked or busy (the application is currently open), or if you don’t have the owner’s permission to rename that icon, you can’t rename it. Similarly, you should never rename certain reserved icons (such as the Library, System, and Desktop folders). To rename an icon, you can. I'm going to give Mac Mail another try. But I can't stand the stamp icon. I'd like to replace it with the iOS icon. I have the.icns file but the old 'get info' trick where you just paste the icon over the existing one doesn't work. I've also tried 'Show Package Contents' on the Mail.app and replacing the ApplicationIcon.icns from the Finder and Terminal under sudo.
by Jenefey AaronUpdated on 2020-03-12 / Update for Downgrade
One of the many perks of Mac users that Windows users would never imagine of getting is free OS upgrade. Every time Apple releases the latest and greatest macOS, they always come with zero dollar price tag. That’s why the adoption rate of the latest macOS always goes through the roof. Who could resist the best OS in the planet for their Macs for free?
But unfortunately, the latest and greatest macOS doesn’t always mean the best for your machine, especially if your machine is old.
Even though your machine is still compatible with the latest macOS High Sierra, the older your Mac is, the more strain from macOS that it has to endure. That’s why it’s understandable that some people with older Macs might want to downgrade Sierra to El Capitan, or from High Sierra to Sierra.
How do you downgrade your macOS? And what if you don’t have Time Machine backups to help you?
How to Downgrade MacOS in Easy Steps
The easiest way to downgrade is to use the backup that you have in your Time Machine, and we will discuss it later. But if you don’t have one, you can use the process described below.
The steps that we’re about to discuss will be more or less the same even under different macOS. There would be slight differences in details, but they aren’t essential. So whether you are downgrading from Sierra to El Capitan or from High Sierra to Sierra, or lower, please make a printout or read this discussion on another device so you can do the steps while having the instructions handy.
Step 1: Back Up Your Current macOS
Since downgrading will erase the current macOS entirely, including the files, programs, or documents, it’s wise to back up your important files prior to starting the process. Use external hard drive or cloud-based storage services like Dropbox, OneDrive, or iCloud.
Step 2: Create Bootable Drive of the Previous macOS
If you are downgrading from Sierra to El Capitan, you need a bootable drive of El Capitan handy. https://trekheavy812.weebly.com/easiest-stick-figure-drawing-software-to-learn-mac.html. But if you’re downgrading from High Sierra, you need Sierra.
Download the installer from AppStore, and use the help from DiskMaker X program to create the bootable disk.
![]() Step 3: Erase the Current macOS
Now is the time to erase the macOS that is currently installed on your computer. If you are downgrading from Sierra to El Capitan, this is the time to erase Sierra. Here are the steps.
After the process is complete, quit Disk Utility from the drop-down menu in the upper left corner of the screen to go back to the OS X Utilities selector.
Step 4: Reinstall the Previous Version of macOS
After wiping out your current macOS installation, you need to reinstall the previous version of macOS. If you are downgrading from Sierra to El Capitan, this is the time to install El Capitan. You need to have your installation USB plugged in.
Just follow the process, and after it finishes, you’ll have your freshly installed Mac ready to roll.
The Easiest Way to Downgrade to Mac OS X EI Captitan
If you have a recent backup of your Mac, you can bypass those rather complicated process to revert to EI Captain.
Then the restore process will begin. It could take a while, so you can sit back and relax.
Another Method to Backup and Recover
Apple’s Time Machine is not the only player in the data backup and recover field. Another recommended tool for the job is Tenorshare Data Recovery for Mac. This app is a complete Mac data recovery solution to recover all types of files from Mac's hard drive and other portable devices like USB flash drive, external hard drive, SD card, iPhone, etc. on macOS or mac OS X.
OS X El Capitan was announced back in June and released late last month, and if you’re still dabbling around with the new version, here are ten OS X El Capitan settings that you should change.
We’ve already discussed some of the new features in OS X El Capitan, as well some hidden features that you should know about, but if you recently updated to the new version and are still setting it up, there are a handful of settings that you should know about.
OS X El Capitan keeps the same overall design and look as OS X Yosemite, with a few minor differences that you may or may not notice right away. However, there are a handful of new features and improvements that users should enjoy, like enhancements to Spotlight Search, a new Split-View multitasking mode, a revamped Notes app, new swipe gestures and more.
It’s certainly not the overhaul that OS X Yosemite received over Mavericks, but it’s at least an improvement over OS X Yosemite, which certainly had some problems of its own.
If you’re looking to improve El Capitan even more, here are 10 OS X El Capitan settings that you should change.
Enable the Dashboard
Apple got rid of the Dashboard when it introduced the Notification Center in OS X, but it’s actually still a part of OS X El Capitan — it just needs enabled first.
While the Dashboard has become less and less popular over the years, some people still enjoy using it, as it provides you with a quick look at a handful of different things, like weather, stocks, sports scores, etc.
To enable the Dashboard, simply navigate to System Preferences > Mission Control and where it says Dashboard, click on the drop-down menu and select As Space.
Allow App Downloads From Anywhere
If you tend to download Mac apps from sources other than the Mac App Store, there’s one setting that you’ll want to change.
While it’s known as a security feature on Macs, it can sometimes be a feature that isn’t all too useful for some users. By default, your Mac can only download apps that come from the Mac App Store, but you can quickly change this in the settings.
Open up System Preferences and click on Security & Privacy. At the bottom, select Anywhere under Allow apps downloaded from.
Disable the Shake Mouse Pointer Gesture
One of the big new features in OS X El Capitan is actually a small feature, but it can save you a lot of headache. If you ever lose the mouse pointer on the screen, shaking the cursor with your mouse or trackpad with enlarge the cursor so it’s easier to find.
However, not everyone needs this feature, especially if you have a small 11″ or 13″ MacBook. To disable the gesture, open System Preferences, click on Accessibility, and then Display. Uncheck the box that says Shake mouse pointer to locate.
Customize App Store Password Settings
When you go to download a paid app in the Mac App Store, you’ll have to enter in your Apple ID password, but if you don’t want to keep entering in your password whenever you download an app from the Mac App Store, OS X El Capitan can now save your password for certain types of app downloads.
To set this up and customize it, go into System Preferences and click on App Store. At the bottom, you can customize password settings and either require a password every time for purchases or choose to remember it for 15 minutes. You can also save your password for all free app downloads.
Automatically Hide the Menu Bar
If you like having the dock automatically hide away when it’s not being used, you can now do the same thing with the menu bar in OS X El Capitan.
Change App Icon Mac El Capitan Free
Navigate to System Preferences > General, and check the box next to Automatically hide and show the menu bar. This will hide the menu bar when you’re not using it, and whenever you need to access to it, just move your mouse to the top of the screen to bring it down into view.
Bring Back Three-Finger Tap
One nifty trackpad gesture in OS X is the three-finger tap, which lets you quickly get a dictionary definition of a word.
However, this gesture has been disabled by default in OS X El Capitan for whatever reason, but it’s really easy to get it back.
Simply just open up System Preferences, click on Trackpad, and select the Point & Click tab at the top. Then, place a checkmark next to Look up & data detectors.
Customize Apps That Boot Upon Startup
One feature that every user should audit every once in a while are the apps that automatically open and launch when you boot up your Mac. You most likely have apps that don’t need to launch upon boot-up, thus slowing down your Mac’s boot-up time and overall performance.
Open System Preferences and click on Users & Groups. From there, click on Login Items tab at the top. You’ll be shown a list of the apps that will automatically open when you boot up your Mac.
To prevent a certain app from doing this, highlight and then click the minus icon to remove it from the list. You can also hide the app if it does launch upon boot-up.
Enable a Screen Saver Password
Setting up a password in order to log into your Mac is a great security feature, but if you’re in a coffee shop or library and need to go the restroom or something, it’s also a good idea to enable a screen saver password, which will make you type in your password in order to get rid of the screen saver and go back to working.
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Open up System Preferences and click on Security & Privacy. From there, select the General tab. Place a checkmark next to Require password, and then in the drop-down menu next to that, you can select an option for when you want the password to activate after the screen saver turns on. It’s best to choose Immediately.
Customize Keyboard Shortcuts
Keyboard shortcuts are great to use, and you probably already know a handful of them. However, that’s likely the tip of the iceberg.
There are so many more keyboard shortcuts in OS X El Capitan, and not only can you view them in System Preferences, you can also customize them to your liking.
Change App Icon Mac Os
By navigating to System Preferences > Keyboard > Shortcuts, you can view all of the keyboard shortcuts available in OS X and even customize them if you want to change things up.
Download El Capitan App StoreAdjust Power Saver Settings
If you have a MacBook, you probably want to get the most battery life you can out of it on a single charge, which is why it’s a good idea to adjust and customize your Mac’s power settings.
Install El Capitan App
Open up System Preferences and click on Energy Saver. From there, there will be a handful of options, including how long you want your screen to stay on when your Mac is inactive, as well as powering down hard drives whenever possible and enabling or disabling Power Nap.
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