Tag: macOS

12
Sep
2018

Access more image format export options in macOS Preview

Preview is a great basic image editing application bundled with macOS, but recent versions have simplified the available image export format options down to JPEG, JPEG 2000, OpenEXR, PDF, PNG and TIFF. Or at least that’s what you see on first glance.

It turns out you can still access all the traditional image format options from the Save and Export panels just by holding down the Option (Alt) key when clicking on the Format menu.

Holding the Option (Alt) key when selecting format reveals all possible image formats. You can use this to convert existing images to different formats, or to save the file as a less common format.

22
May
2017

macOS Wi-FI Tip

Did you know that you can quickly access information about your Router, and check if your Wi-Fi Network is performing well? See your BSSID, signal-to-noise ratio, and even the transmit rate between your Router and Computer. All it takes is a press of a button and a click of your trackpad/mouse.

If you hold down the Option (alt) key and click the Wi-Fi icon in the menu bar, it will provide you with details about your Router and the Network you’re using. The items in gray (except for “Wi-Fi: On”) are all pieces of additional information seen only in this mode.

IP Address: This is your computer’s IP address.

Router: Your router’s IP address. You can type this into your browser to access your router’s web interface.

Internet: This tells you if you are able to access the internet or not. If not, open Wireless Diagnostics.

Security: Your router’s security. Most Routers on the market offer WPA2 Personal, and it keeps your network encrypted.

BSSID: This is your Router’s MAC, or hardware address. It acts as an identifier for your Router that lets it talk to other network-connected devices.

Channel: This is your WLAN channel, and it determines which radio frequency the router uses to transmit information.

RSSI: Received Signal Strength Indicator measures how well a device “hears” a signal from the router. It’s useful for determining if you have enough signal to get a good wireless connection.

Noise: This measures how much radio noise is interfering with the RSSI signal. Signal-to-noise ratio is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined as the ratio of signal power to the noise power, often expressed in decibels.

TX Rate: The transmit rate is the speed of the data that is transmitted between your Router and your Computer. Right now I have a speed of 450 Mbps.

PHY Mode: This is the wireless protocol that the Router uses, according to the IEEE 802.11 wireless standard.

MCS Index: This number corresponds to the protocols uses to encode the radio signal.

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