Prevent your computer from going to sleep
Click it to prevent your Mac from automatically going to sleep, dimming the screen or starting screen savers. It is a unified minimalist anti-sleep timer. Open source window manager based on the Spectacle app. Step 1: To download Caffeine it is obligatory for an uninterrupted internet connection. Caffeine used to be among the first things I installed on a Mac, but it hasn’t been updated in years and doesn’t play very well with the newer OS’s. It’s also no longer on the app store. Amphetamine is a for all of those problems and more — on the app store, free, actively maintained, and as capable if not more so than Caffeine.
If you have problems with your PC locking or going to sleep, caffeine will keep it awake. It works by simulating a keypress once every 59 seconds, so your machine thinks you're still working at the keyboard, so won't lock the screen or activate the screensaver.
The icon is shown above - it's the leftmost one in the task tray, and this is all you see. Double-clicking the icon empties the coffee pot (that's what the icon is) and temporarily disables the program. Double-clicking it again refills the pot, and will keep your machine awake.
By default the app starts enabled, and works every 59 seconds. There are some command line switches you can use to alter this behaviour:
xx
- where xx is a number which sets the number of seconds between simulated keypresses. This must be the first text on the commandline-startoff
- application starts disabled.-exitafter:xx
- application will terminate after xx minutes-activefor:xx
- application will become inactive after xx minutes-inactivefor:xx
- application will become active after xx minutes-appexit
- terminates current running instance of application-appon
- makes the current running instance of the application active-appoff
- makes the current running instance of the application inactive-apptoggle
- toggles the running state of the current running instance of the application-apptoggleshowdlg
- toggles the running state, and shows dialog-replace
- closes the current running instance, replacing it-noicon
- does not show a task tray icon-useshift
- simulate the shift key instead of F15-showdlg
- shows a dialog indicating whether caffeine is active-ontaskbar
- show a task bar button (use with -showdlg)-allowss
- prevent sleep, but allow the screensaver to start-key:xx
- simulate using virtual key code xx
Note: the codes on the linked page are in Hex, convert them to decimal for use with this parameter-keypress
- simulate a full key press, not just a key up event-oldicons
- use more colourful tray icons-darkicons
- use icons which work better for dark-on-light colour schemes-watchwindow:xx
- active only when a window with xx in the title is found-activehours:..xxxxxxxx..
- put 24 . or x characters - which indicate from hour 0 to hour 23 of the day. Caffeine will be active only in hours with an x
Compatibility
Caffeine App Windows
Caffeine works by simulating an F15 key up event every 59 seconds. Of all the key presses available, F15 is probably the least intrusive, and least likely to interfere with your work. Download moviemaker for mac os x.
However, Caffeine might interfere with some apps: https://termavipor1971.wixsite.com/freeprogramsutilitie/post/rune-factory-oceans-wii-iso.
- PowerPoint uses the F15 keypress to pause video in a slide
- Google Docs/Sheets
- Smartsheet
- Terminal emulation, e.g. Putty
If you think any of these might cause you a problem, set the
-useshift
command line parameter.Video
Caffeine user humancar2n has put together a short YouTube video showing how the app works.
Mac version
Do you need this functionality on your Mac? Lighthead Software have written a separate app, also named Caffeine, which can help you out.
Versions
v1.90 - October 2020
-darkicons
command line option added-activehours
command line option addedTooltip replaced with a new one which works more reliably
Menu appearance updated
v1.81 - May 2020
Bug with the
-watchwindow
command line fixedv1.80 - January 2020
v1.64 - September 2017
Option for old icons added, 'cos not everyone likes the new ones
v1.63 - February 2017
Icons updated slightly to show up better on a white background.
v1.62 - April 2016
New icons, designed by Rubén Gómez Radioboy
![App App](/uploads/1/1/4/0/114025457/257243611.jpg)
v1.61 - October 2015
Fixed bug with app not going active/inactive correctly when a timed period elapsedv1.60 - July 2013
New command line options:
-allowss
-ontaskbar
-apptoggleshowdlg
-key:xx
-keypress
Added menu items to go Active/Inactive
Type in About box corrected
-apptoggle
will re-show the dialog if it was originally shown![Caffeine Caffeine](/uploads/1/1/4/0/114025457/300197200.jpg)
v1.50 - November 2010
New command line options:
-inactivefor
-showdlg
-apptoggle
Simulated keypress changed from right context menu key to F15 as this is likely to be even less intrusive.
v1.40 - July 2009
New command line options:
-replace
-noicon
-useshift
Hovering over the tray icon now shows the status of the app
v1.35 - May 2009
Simulated keypress changed from shift to the right context menu key (at the suggestion of Kevin Kleinfelter) as this is likely to be less intrusive.
v1.30 - February 2009
Merry Christmas and Happy Holidays to all! ↓↓↓↓↓↓ CLICK TO SEE MORE ↓↓↓↓↓↓↓↓ 1 Year Ago: https. https://pamplusiti1984.mystrikingly.com/blog/ellie-and-jared-egg-roulette. After watching the videos, ask a student to review the rules of the game: one dozen eggs are presented; 8 hard boiled and 4 raw. There is no visible difference in the eggs. Players take turns selecting an egg and cracking that egg on their own head. The first person to crack two raw eggs on his head loses. Guest of the show always goes first. For collaborations, business inquiries, and personal inquiries please contact [email protected] Ellie and Jared Mecham PO BOX 6421 LOGAN UT 84341.
Command line switches added to terminate the app after x minutes, disable the app after x minutes, and enable or disable the currently running instance of the app
Download Caffeine App For Mac
v1.20 - March 2008
Download Caffeine
Command line switches added to set the interval and to start disabled
Download Caffeine (x86 and x64)
Caffeine App For Mac Free Download
What could be better than a little caffeine to keep your computer from going to sleep, dimming the screen, or starting the screensaver?
This is the purpose of Caffeine, a small tool for Mac that keeps your computer awake so that your system won't disconnect.
Caffeine runs silently from the menu bar. An icon displaying 'Zzz' will remind you that your computer will be awake so long as it is activated.
Click the application's icon to deactivate it. If you click the icon and press the command button at the same time, you can access a small menu that will display information about the version of the application as well as its author.
This is the purpose of Caffeine, a small tool for Mac that keeps your computer awake so that your system won't disconnect.
Caffeine runs silently from the menu bar. An icon displaying 'Zzz' will remind you that your computer will be awake so long as it is activated.
Click the application's icon to deactivate it. If you click the icon and press the command button at the same time, you can access a small menu that will display information about the version of the application as well as its author.