Downloading Dropbox. Your Dropbox download should automatically start within seconds. Once the download finishes, click Run to start installing Dropbox. OS 10.8 was the first OS to Feature Dictation so there's been a lot of improvements in these past years and macOS and OS X versions. Finally, some users report success by updating their DNS Servers to add the following DNS entries to 208.67.220.220 and 208.67.222.222. (0) Clearing the SSL state can help you fix the ERRSSLPROTOCOLERROR error message. Follow the steps below, please, to learn how to do it: Click the three-dot icon in the upper right-hand corner of the screen and select Settings. Scroll down to the bottom and click on Advanced (Settings).
These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.
What you need to create a bootable installer
- A USB flash drive or other secondary volume formatted as Mac OS Extended, with at least 14GB of available storage
- A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra, or El Capitan
Download macOS
- Download: macOS Big Sur, macOS Catalina, macOS Mojave, or macOS High Sierra
These download to your Applications folder as an app named Install macOS [version name]. If the installer opens after downloading, quit it without continuing installation. To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server. - Download: OS X El Capitan
This downloads as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It installs an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.
Use the 'createinstallmedia' command in Terminal
- Connect the USB flash drive or other volume that you're using for the bootable installer.
- Open Terminal, which is in the Utilities folder of your Applications folder.
- Type or paste one of the following commands in Terminal. These assume that the installer is in your Applications folder, and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace
MyVolume
in these commands with the name of your volume.
Big Sur:*
Catalina:*
Mojave:*
High Sierra:*
El Capitan:
* If your Mac is using macOS Sierra or earlier, include the --applicationpath
argument and installer path, similar to the way this is done in the command for El Capitan.
After typing the command:
- Press Return to enter the command.
- When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
- When prompted, type
Y
to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the volume is erased. - After the volume is erased, you may see an alert that Terminal would like to access files on a removable volume. Click OK to allow the copy to proceed.
- When Terminal says that it's done, the volume will have the same name as the installer you downloaded, such as Install macOS Big Sur. You can now quit Terminal and eject the volume.
Use the bootable installer
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps: Fourier godot playground mac os.
Apple silicon
- Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
- Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes.
- Select the volume containing the bootable installer, then click Continue.
- When the macOS installer opens, follow the onscreen instructions.
Intel processor
- Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
- Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
- Release the Option key when you see a dark screen showing your bootable volumes.
- Select the volume containing the bootable installer. Then click the up arrow or press Return.
If you can't start up from the bootable installer, make sure that the External Boot setting in Startup Security Utility is set to allow booting from external media. - Choose your language, if prompted.
- Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.
Learn more
Nothing Ekberg Mac Os X
A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model.
For information about the createinstallmedia
command and the arguments you can use with it, make sure that the macOS installer is in your Applications folder, then enter the appropriate path in Terminal:
Regular expressions is a powerful tool for solving many problems related to text. It can be misused as any good tool, but there are moments when they are the best solution for a given problem. At those moments the lack of regular expressions for Cocoa on Mac OS X and Cocoa Touch on iPhone OS is a pain in the butt.
Or are regular expressions really missing? Regular expressions can be used with NSPredicate
that is part of Core Data, available since Mac OS X 10.4 and officially announced for iPhone OS 3.0. Cocoa's WebView
and the equivalent UIWebView
in Cocoa Touch both support JavaScript with regular expressions. So there sure is regular expressions available on the platforms, but how do you make it available for your own code?
Nothing Ekberg Mac Os Download
An Ugly Solution
You can actually get access to the regular expression engine through JavaScript, unfortunately this requires a roundtrip through WebKit. On an iPhone this means you have to use an off-screen instance of UIWebView
, and delegate execution of regular expression to it.
The complexity of an off-screen WebView
or UIWebView
could be hidden by a utility class. But the extra glue code needed to make something useful out of the single method stringByEvaluatingJavaScripFromString:
, would be allot.
What Apple Recommends
For most problems the official stance is correct; do not use regular expressions. Instead use NSScanner
, that is perfect for sequentially parse texts. It is very fast and can substitute any regular expressions that only relies on:
- Character sets
- Exact string matches
- Numerical matches
- Uniform input text
These conditions hold true to 95% of everything regular expressions is ever used for. For the other 5%, Apple leaves you to fend for your own.
Other Solutions
PCRE compiles perfectly with Cocoa, since it is written in C, one of the many advantages of Objective-C. PCRE is very capable, and almost a standard, but also very large. For an iPhone application the PCRE implementation could end up as the majority of your executables file-size. If this is something you can live with, then the open source RegexKit framework wraps PCRE in Cocoa and Cocoa Touch friendly Objective-C.
Another regular expressions framework is OgreKit. The advantage of OgreKit is full unicode support, with the same disadvantage of size. And the fact that the documentation is in Japanese.
A Pretty Solution
It turns out that Mac OS X for years, and iPhone OS since inception, has been shipped with a perfectly good regular expressions engine. This engine is based on the ICU specification, so it works perfectly with unicode and is well on par with PCRE for functionality. This framework is simply called ICU Core, and has a C interface. But for a Cocoa programmers the C interface is not nice enough, and thankfully John Engelhart has done this work for us, with RegexKitLite. RegexKitLite is a little brother to RegexKit that wrapps ICU Core instead of PCRE.
RegexKitLite is published under BSD license, and is simply two files you add to your project, fully compatible with all available versions of both Mac OS X and iPhone OS. The tricky part is that ICU Core is not a public API officially supported by Apple, even though it has existed unchanged for years. Good news is that using ICU Core is not a show stopper for publishing on the iPhone App Store, application out there already uses it, both well known and not so well known.
Setting Up RegexKitLite
- Download the latest version from the sourceforge webpage, or SVN.
- Add
RegexKitLite.h
andRegexKitLite.m
to your project. - Link your project against ICU Core, by adding the linker flag
-licucore
to Other Linker Flags under your projects build settings.
Optionally you can also add the documentation to Xcode with these easy steps:
- Open Help -> Documtantion.
- Press the Gears button in the lower left corder, and select New Subscription….
- Enter
feed://regexkit.sourceforge.net/RegexKitLiteDocSets.atom
as URL.
Using RegexKitLite
This post is not a tutorial on regular expressions, but a tutorial on a partical API for executing regular expressions. If you want to learn more about regular expressions themselves I would recomend you look at Regular Expressions.info.
RegexKitLite provides it's functionality as categories on NSString
and NSMutableString
. This way using regular expressions with Cocoa is just as easy and normal string manipulation. This is best described using examples.
A simple example that normalizes a text with single white spaces, kind of like how a HML renderer would do, so this is handy when scraping web pages:
Or you can split a text, such as semi-colon delimeted data:
And you can extract more complex data using capture groups:
This may look like it could be slow to perform matches on the same regular expression twice, but it is not. Mighty switch force! academy mac os. RegexKitLite is very smart, and will cache your previous matches for very high performance.
- Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
- Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
- Release the Option key when you see a dark screen showing your bootable volumes.
- Select the volume containing the bootable installer. Then click the up arrow or press Return.
If you can't start up from the bootable installer, make sure that the External Boot setting in Startup Security Utility is set to allow booting from external media. - Choose your language, if prompted.
- Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.
Learn more
Nothing Ekberg Mac Os X
A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model.
For information about the createinstallmedia
command and the arguments you can use with it, make sure that the macOS installer is in your Applications folder, then enter the appropriate path in Terminal:
Regular expressions is a powerful tool for solving many problems related to text. It can be misused as any good tool, but there are moments when they are the best solution for a given problem. At those moments the lack of regular expressions for Cocoa on Mac OS X and Cocoa Touch on iPhone OS is a pain in the butt.
Or are regular expressions really missing? Regular expressions can be used with NSPredicate
that is part of Core Data, available since Mac OS X 10.4 and officially announced for iPhone OS 3.0. Cocoa's WebView
and the equivalent UIWebView
in Cocoa Touch both support JavaScript with regular expressions. So there sure is regular expressions available on the platforms, but how do you make it available for your own code?
Nothing Ekberg Mac Os Download
An Ugly Solution
You can actually get access to the regular expression engine through JavaScript, unfortunately this requires a roundtrip through WebKit. On an iPhone this means you have to use an off-screen instance of UIWebView
, and delegate execution of regular expression to it.
The complexity of an off-screen WebView
or UIWebView
could be hidden by a utility class. But the extra glue code needed to make something useful out of the single method stringByEvaluatingJavaScripFromString:
, would be allot.
What Apple Recommends
For most problems the official stance is correct; do not use regular expressions. Instead use NSScanner
, that is perfect for sequentially parse texts. It is very fast and can substitute any regular expressions that only relies on:
- Character sets
- Exact string matches
- Numerical matches
- Uniform input text
These conditions hold true to 95% of everything regular expressions is ever used for. For the other 5%, Apple leaves you to fend for your own.
Other Solutions
PCRE compiles perfectly with Cocoa, since it is written in C, one of the many advantages of Objective-C. PCRE is very capable, and almost a standard, but also very large. For an iPhone application the PCRE implementation could end up as the majority of your executables file-size. If this is something you can live with, then the open source RegexKit framework wraps PCRE in Cocoa and Cocoa Touch friendly Objective-C.
Another regular expressions framework is OgreKit. The advantage of OgreKit is full unicode support, with the same disadvantage of size. And the fact that the documentation is in Japanese.
A Pretty Solution
It turns out that Mac OS X for years, and iPhone OS since inception, has been shipped with a perfectly good regular expressions engine. This engine is based on the ICU specification, so it works perfectly with unicode and is well on par with PCRE for functionality. This framework is simply called ICU Core, and has a C interface. But for a Cocoa programmers the C interface is not nice enough, and thankfully John Engelhart has done this work for us, with RegexKitLite. RegexKitLite is a little brother to RegexKit that wrapps ICU Core instead of PCRE.
RegexKitLite is published under BSD license, and is simply two files you add to your project, fully compatible with all available versions of both Mac OS X and iPhone OS. The tricky part is that ICU Core is not a public API officially supported by Apple, even though it has existed unchanged for years. Good news is that using ICU Core is not a show stopper for publishing on the iPhone App Store, application out there already uses it, both well known and not so well known.
Setting Up RegexKitLite
- Download the latest version from the sourceforge webpage, or SVN.
- Add
RegexKitLite.h
andRegexKitLite.m
to your project. - Link your project against ICU Core, by adding the linker flag
-licucore
to Other Linker Flags under your projects build settings.
Optionally you can also add the documentation to Xcode with these easy steps:
- Open Help -> Documtantion.
- Press the Gears button in the lower left corder, and select New Subscription….
- Enter
feed://regexkit.sourceforge.net/RegexKitLiteDocSets.atom
as URL.
Using RegexKitLite
This post is not a tutorial on regular expressions, but a tutorial on a partical API for executing regular expressions. If you want to learn more about regular expressions themselves I would recomend you look at Regular Expressions.info.
RegexKitLite provides it's functionality as categories on NSString
and NSMutableString
. This way using regular expressions with Cocoa is just as easy and normal string manipulation. This is best described using examples.
A simple example that normalizes a text with single white spaces, kind of like how a HML renderer would do, so this is handy when scraping web pages:
Or you can split a text, such as semi-colon delimeted data:
And you can extract more complex data using capture groups:
This may look like it could be slow to perform matches on the same regular expression twice, but it is not. Mighty switch force! academy mac os. RegexKitLite is very smart, and will cache your previous matches for very high performance.
RegexKitLite is a very capable, and also much active open source project, with version 3.0 as a release candidate in SVN. Use it, and use it well.